Glucose Required for Tissue Formation and Its Effects on Cane Yield, Recoverable Sugar, and Sugar Yield

Diana, Nunik Eka; Supriyadi, undefined; Djumali, undefined; Santoso, Budi; Herwati, Anik; Yulaikah, Sri; Supriyono, undefined; Hamida, Ruly; Ridhawati, Aprilia; Abdurrakhman, undefined

doi:https://doi.org/10.1155/2020/6643045

International Journal of Agronomy

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Abstract Introduction Materials and Methods Results and Discussion Discussion Conclusions Abbreviations Data Availability Conflicts of Interest Authors’ Contributions Acknowledgments References Copyright Related Articles

Research Article | Open Access

Volume 2020 | Article ID 6643045 | https://doi.org/10.1155/2020/6643045

Glucose Required for Tissue Formation and Its Effects on Cane Yield, Recoverable Sugar, and Sugar Yield

Nunik Eka Diana,¹ Supriyadi,¹ Djumali,¹Budi Santoso,¹Anik Herwati,¹Sri Yulaikah,¹ Supriyono,¹Ruly Hamida,¹Aprilia Ridhawati,¹and Abdurrakhman¹

Academic Editor: Vera Popovic

Received26 Oct 2020

Revised06 Nov 2020

Accepted13 Nov 2020

Published29 Nov 2020

Abstract

Glucose in sugarcane affected cane yield, recoverable sugar, and sugar yield. Glucose is available since the formation of the stems and stored until sugarcane is ready to be harvested. Information regarding the need for glucose to form sugarcane plant tissue is still not widely available. So, research was conducted to determine the quantity of glucose to form sugarcane plant tissue and its relation to cane yield, recoverable sugar, and sugar yield obtained. The research was carried out at the Karangploso Research Station and Laboratory of Plant Chemistry, Indonesian Sweeteners and Fiber Crops Research Institute, in July 2016–September 2017. A split plot design with two factors and three replications was utilized. The main factor was the growth phases, namely, the vegetative phase and maturity phase, while the other factor was sugarcane varieties, namely, PS-881 (early mature), JR-01 (early-middle mature), Kenthung (early-middle mature), and Bululawang (middle-late mature). The measurements of nitrogen, carbon, and the ash content of the leaves and stems were at 5 months (representing the growth period) and 9 months (representing the ripening period). The results showed that quantities of 1.962–2.160 kg and 2.066–2.113 kg glucose were required to form each kg of leaf and stem tissue depending on the growth phase and variety. Glucose requirements in the maturing phase affected the cane yield, recoverable sugar, and sugar yield as much as by 51.48%, 57.60%, and 58.26%, respectively.

1. Introduction

The Indonesian sugar production was 2.212 million tonnes in 2017, while the projected national sugar consumption demand would be 2.825 million tonnes in 2019 so that the shortfall needs to be imported. The sugar production needs to be increased to achieve self-sufficiency of household sugar demand.

The production can be obtained by increasing the productivity of cane yield and sucrose content as well. Cane yield is cumulative of glucose available for stem growth during the formation of the stem until the stem is harvested [14]. The sugar yield is the result of the accumulation of sucrose deposits in the stem during the ripening phase to harvest [8]. Glucose is derived from the results of daily photosynthesis after being reduced by the process of respiration maintenance [15].

Glucose produced by daily photosynthesis is used for respiration maintenance, and the rest is used for growth and storage [10]. Glucose for growth is partitioned into roots, stems, and leaves. Glucose that enters the root and leaf organs is used to form root and leaf tissue [6]. Glucose that goes into the stem is used to form stem tissues during the growth phase and used for glucose stem reserve during the ripening phase [21]. Each sugarcane variety requires different amounts of glucose to form root, stem, and leaf tissues depending on the organic compounds that make it up [13]. The varieties that need high glucose to form plant tissue will produce lower plant growth than those that require low glucose. Until now, there is not much information about the amount of glucose required to form 1.0 kg of plant organ tissue for each sugarcane variety. The research hypothesis was the varieties requiring high glucose to form plant tissues will produce low cane yield; therefore, the sugar yield will also be low. The main aim of this research was to find out the value of the quantity of glucose required to form a sugarcane plant tissue and its relation to cane yield, recoverable sugar, and sugar yield.

2. Materials and Methods

Research has been conducted at the Karangploso Research Station and the Laboratory of Plant Chemistry, Indonesian Sweeteners and Fiber Crops Research Institute, in July 2016–September 2017.

The treatment was arranged in a split plot design with 3 replications. The main plot was growth phases, namely, the vegetative growth phase (age: 5 months after planting) and the maturing phase (9 months after planting). The subplot was sugarcane varieties, namely, PS-881 (early mature sugarcane), JR-01, Kenthung (early-middle mature sugarcane), and Bululawang (middle-late mature sugarcane). Each plot consisted of five 10 m rows with 110 cm apart. Besides growth and maturing phase, observations were also made during the production phase when the plants were harvested (12 months after planting). Observation of production parameters include cane yield, recoverable sugar, and sugar yield. Cane yield is measured by weighing the harvested stems per plot. Recoverable sugar is measured by taking samples of harvested stems, milking them, and measuring brix and pol from the extracted liquid. The sugar yield is calculated based on the cane yield and recoverable sugar obtained.

Sampling was started 5 months after planting (representing the growth period) and 9 months after planting (representing the maturing period). Six plant samples were taken from each plot and separated between stems and leaves, and then they were dried and powdered. The powders were analysed for ash, nitrogen, and carbon content. Ash content (A) was quantified with the ashing method using a muffle oven (furnace) at an initial temperature 250°C for 1 hour and continued to 600°C for 2 hours. Nitrogen (N) content was analysed using the Kjeldahl method, and carbon content (C) was analysed using the Walkley–Black method.

Glucose required for growth (CRG) and CO₂ produced during growth (CPG) are calculated by the equation given by Vertregt and Penning de Vries [17]:where C is the carbon content (g.kg⁻¹), A is the ash content (g.kg⁻¹), and N is the nitrogen content (g.kg⁻¹).

3. Results and Discussion

3.1. Cane Yield, Recoverable Sugar, and Sugar Yield

Sugarcane yield, recoverable sugar, and sugar yield were influenced by the varieties used (Table 1). JR-01 variety produced the highest cane and recoverable sugar so that the sugar yield was the highest. The Bululawang cane yield was not different from PS-881 and Kenthung, but recoverable sugar was the lowest so that the sugar yield was the lowest.

In this research, the relationship between sugar yield and recoverable sugar (RS) and cane yield (CY) was calculated with sugar = 0.9205 RS + 0.9311 CY − 0.8552 with a correlation coefficient (r) of 1.00. These results mean that 100% of the sugar yield was determined by the recoverable sugar and cane yield. The effect of recoverable sugar and productivity on the sugar yield was 49.13% and 50.87%, respectively. Thus, the two components have the same strong influence in determining the sugar yield.

3.2. Glucose Required to Form Tissues and Carbon Dioxide Released

Glucose required to form tissue (leaves and stems) and carbon dioxide released during the process of tissue formation were influenced by the growth phase, sugarcane variety, and the interaction of both (Tables 2 and 3).

Stepwise regression analysis showed that the effects of N, C, and ash content on leaf tissue formation during the fast-growing phase were 31.58%, 39.18%, and 29.24%, respectively, and 100% in total. Additionally, the N, C, and ash effects were 24.89%, 40.52%, and 34.48%, respectively, and 99.9% in total. The influence of N, C, and ash content during the fast-growing phase on the stem was 18.66%, 46.94%, and 34.40%, while during the maturing phase, it was 16.57%, 60.59%, and 22.83%, respectively. The effect of N levels on glucose requirement was higher during the fast-growing phase than the maturing phase.

The energy conversion through growth respiration was measured from the amount of CO₂ released during tissue formation. It was influenced by the growth phase, the variety, and the interactions of both (Table 3).

The influences of variety, growth phase, and their interaction on CO₂ released were similar to the effect on glucose requirements. The relationship between required glucose for leaves (GL) and CO₂ released was GL = 0.7128 CO₂ + 0.2917 (r = 0.984) for the fast-growing phase and GL = 0.7046 CO₂ + 0.2959 (r = 0.989) for the maturing phase. The relationship between required glucose for stems (GS) and CO₂ released was GS = 0.4970 CO₂ + 0.5005, with a correlation coefficient (r) of 0.957 for the fast-growing phase and GS = 0.5118 CO₂ + 0.4857 with a correlation coefficient (r) of 0.975 for the maturing phase.

4. Discussion

Table 1 shows that sugar yield was influenced by productivity and recoverable sugar. Variety had specific characteristics that influenced productivity and recoverable sugar also. This statement was supported by Supriyadi et al. [16] and Djumali et al. [3] who showed the effects of sugarcane varieties on productivity, recoverable sugar, and sugar yield. Then, Gomathi et al. [6] stated the sugar yield illustrates the yield of sucrose obtained per unit area of land. Recoverable sugar and cane yield are the two main components that make up sugar productivity [2, 9].

The sugar yield is the result of the accumulation of glucose saved in the stem during the ripening phase till harvest. Glucose is obtained from the daily results of photosynthesis after being reduced to the needs of the respiration process. Glucose required to form leaf and stem tissues during the rapid growth phase was greater than during the maturing phase. According to Penning de Vries et al. [13], plant tissue (leaves, stems, roots, flowers, fruits, and seeds) is composed of carbohydrates, proteins, fats, lignins, organic acids, and minerals in different compositions. It was further explained that the formation of every kg of carbohydrates, protein, fat, and organic acids required as much as 1.275 kg, 1.887, 3.189 kg, 2.231, 0.954 kg of glucose, respectively. During the fast-growth phase, more glucose from photosynthesis is used for the formation of leaf, stem, and root tissue, whereas during the maturing phase, it is mostly used for carbohydrate storage [18]. Therefore, more glucose is required to form leaf and stem tissues during the fast-growth phase than during the maturing phase.

Consequently, glucose required to form leaf and stem tissues during the fast-growing phase is higher than the maturing phase. He et al. [7] reported that leaf and stem tissues containing high N nutrients require high glucose levels to form these tissues. According to Pawirosemadi [12], N nutrient needs in the vegetative phase are more than in the maturing phase. Furthermore, Fortes et al. [4] and Yong et al. [19] stated that N nutrient is a constituent of protein compounds, and protein is the most important component in the growth phase.

Bululawang required the most glucose to form leaf tissue during the fast-growing phase, while Kenthung and Bululawang required the most during the maturing phase. PS-881 and Bululawang required the most glucose to form stem tissue during the fast-growth phase, and PS-881 required the most during the maturing phase. This is thought to be caused by protein compounds formed in these tissues more than the other varieties, thus requiring a higher amount of glucose. According to Darmawan and Baharsyah [1], glucose required to form tissue is partly converted into energy and partly for the preparation of organic compounds. These results mean that the more the leaf tissue is formed, the higher the rate of growth respiration is. According to Zhao et al. [20] and Miri et al. [11], the faster the growth rate of a plant tissue, the faster the rate of growth respiration.

4.1. Relationship of Glucose Requirement with Cane Yield, Recoverable Sugar, and Sugar Yield

The cane yield (CY) and glucose required to form leaves during the fast-growth phase (GLG) and maturing (GLM), as well as glucose required to form the stem during the fast-growth phase (GSG) and the maturing phase (GSM), had the correlation coefficient (r) same as that without GLM which is equal to 0.959. GLM did not affect cane yield because without GLM, the total effect did not change that is equal to 95.9%. Thus, the equation is CY = −1.9053 GLG − 1.8952 GSG − 6.0153 GSM + 10.5335. This equation shows that the three contents of glucose required (GLG, GSG, and GSM) have a negative effect on cane yield. According to Glassop et al. [5], when glucose available for growth was not different, the higher glucose for tissue formation, the lower the weight of the tissue formed so that the lower the cane yield. The multiple linear regression analysis using a step back showed the total effect was 95.9% which consisted of the influence of GLG at 34.24%, GSG at 10.18%, and GSM at 51.48%. Thus, the greatest effect on cane yield is GSM followed by GLG and finally GSG.

The correlation coefficient (r) between cane yield and GLG, GSG, GLM, and GSM was 0.722, and it was the same as the correlation coefficient of the relationship between recoverable sugar and GSG, GLM, and GSM. These results mean that GLG has no role in influencing yield with a total effect of 72.2%. Thus, the equation obtained is recoverable sugar (RS) = −1.5138 GSG − 0.9678 GLM − 5.5729 GSM + 8.8306. Further analysis with a step back obtained information that the total effect of 72.2% consists of 12.92% of the influence of GSG, 1.68% of the influence of GLM, and 57.60% of the influence of GSM. Thus, the greatest influence on yield is GSM followed by GSG and finally GLM, in which all of these had negative effects. According to Pawirosemadi [12], tissue formation which required a great amount of glucose showed its meristematic state; thus, the new tissues of the stem are still being formed. In such conditions, available stem glucose is partitioned to new tissues and stored carbohydrates. The high glucose requirement for stem tissue formation reduced glucose available for stored carbohydrates which leads to a decrease in recoverable sugar.

The relationship between sugar yield (SY) and GLG, GSG, GLM, and GSM was SY = −1.7655 GLG − 3.3186 GSG − 0.9435 GLM − 10.6760 GSM + 17.2278 (r = 0.910). It means that the four contents of glucose required (GLG, GSG, GLM, and GSM) affect the sugar yield with a total effect of 91.0%. Further analysis obtained information that the total influence of 91.0% consists of the influence of GLG at 29.01%, GSG at 0.69%, GLM at 3.50%, and GSM at 58.26%. Thus, the greatest influence was GSM followed by GLG GLM, and finally GSG. These results occur as a result of the effect of productivity and recoverable sugar which are equally strong on sugar yield.

4.2. Implications of Research Results

Each kg of sugarcane stem tissue requires 2.066–2.160 kg of glucose, while for leaf tissue, 1.962–2.113 kg glucose is required. When the stem and the leaf weight are proportional, each kg of sugarcane stem requires 4.028–4.273 kg of glucose. Stem weight is the main component in sugarcane productivity besides the number of stems per hectare. Therefore, increasing productivity can be achieved with a high photosynthetic rate and a low maintenance respiration rate of varieties so that glucose is available for the fast-growth phase of the plant.

All glucose required to form plant tissues affect negatively the cane yield, recoverable sugar, and sugar yield. Thus, recoverable sugar and sugar yield can be increased by selecting a variety with a low glucose tissue formation requirement. Agronomic practices may trigger the protein formation such as excessive nitrogen fertilizer which causes a high glucose requirement for tissue formation and reduces cane yield, sugar recovery, and sugar yield.

Glucose requirement for the stem tissue maturing phase is the most dominant factor in influencing cane yield, sugar recovery, and sugar yield with a magnitude of each effect of 51.48, 57.60, and 58.26%. According to the results, cultivation practices or environment conditions triggered by unnecessary formation of new stem tissue in the maturing phase should be avoided.

During the maturing phase, glucose available for stem growth is mainly used for carbohydrate storage as sucrose. This high sucrose concentration inactivates auxins and cytokines and hinders growth. Auxin or cytokine will be reactivated in the presence of water. Therefore, precipitation or irrigation during the maturing phase is likely to activate these hormones, and reserved sucrose will be translocated to the meristem tissue and converted into new stem and leaf tissues such as the growth of side shoots and sucker. This causes productivity, recoverable sugar, and sugar yield to decrease. Therefore, it is necessary to avoid the application of cultivation techniques that trigger the formation of new stem tissue during the maturing phase. Therefore, the glucose requirements for the leaf and stem tissue formations were 1.962–2.113 kg and 2.066–2.160 kg, respectively, which depends on the growth phase and variety. These requirements had negative effects on cane yield, recoverable sugar, and sugar yield. The effects for stem formation on the maturing phase were more dominant in cane yield, recoverable sugar, and sugar yield as much as by 51.48, 57.60, and 58.26%, respectively.

5. Conclusions

Glucose requirements for the leaf and stem tissue formations were 1.962–2.113 kg and 2.066–2.160 kg, respectively, which depend on the growth phase and variety. These requirements had negative effects on cane yield, recoverable sugar, and sugar yield. The effects for stem formation on the maturing phase were more dominant in cane yield, recoverable sugar, and sugar yield as much as by 51.48, 57.60, and 58.26%, respectively.

Abbreviations

CY:	Cane yield
GL:	Glucose for leaves
GLG:	Glucose leaf growth
GLM:	Glucose leaf maturity
GS:	Glucose for stems
GSG:	Glucose stem growth
GSM:	Glucose stem maturity
SY:	Sugar yield.

Data Availability

All the data used to support the findings of this study are included within this manuscript.

Conflicts of Interest

The authors declare that there are no conflicts of interest regarding the publication of this paper.

Authors’ Contributions

All the authors contributed equally to this research and drafting this manuscript.

Acknowledgments

The authors would like to thank the Head of the Sweetener and Fiber Crops Research Institute for funding this research through DIPA in 2016-2017. Their thanks go to Mr. Bambang Heliyanto, Mr. Nur Asbani, and Mr. Lestari who have guided them in the preparation of this manuscript. They also thank the Head of Karangploso Gardens and their staff and all those who have helped in carrying out this research activity.

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Copyright

Copyright © 2020 Nunik Eka Diana et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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