Shading stress after heading enhances the remobilization of nonstructural carbohydrates in rice under different ecological conditions
ABSTRACT Low light levels during rice (Oryza sativa L.) growing seasons may lead to significant reductions in grain yield and quality. The effect of shading stress on remobilization of nonstructural carbohydrates (NSC) from the stem plus sheath (SPS) to the grain, a process crucial to rice grain for...
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Instituto de Investigaciones Agropecuarias, INIA
2021
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oai:scielo:S0718-583920210003003002021-08-16Shading stress after heading enhances the remobilization of nonstructural carbohydrates in rice under different ecological conditionsZeng,YulingLi,QiupingChen,HongLi,BoZhong,XiaoyuanLi,ZhenzhenLu,HuiWang,LiRen,WanjunDeng,Fei Nonstructural carbohydrates Oryza sativa remobilization characteristics shading stress yield ABSTRACT Low light levels during rice (Oryza sativa L.) growing seasons may lead to significant reductions in grain yield and quality. The effect of shading stress on remobilization of nonstructural carbohydrates (NSC) from the stem plus sheath (SPS) to the grain, a process crucial to rice grain formation, was investigated. Field shading experiments were conducted in Hanyuan and Wenjiang, China, using two rice varieties (Huanghuazhan and Guichao II) subjected to shading stress after heading. Stored NSC of 60.00-159.15 g m-2 were remobilized from SPS after heading, contributing 9.63%-23.63% to grain dry weight at maturity. Shading stress resulted in the 23.99%-50.30% and 31.65%-61.33% reduction in NSC content of SPS at 20 d after heading (DAH20) and maturity stages, respectively. This contributed to the 13.80%-89.00% increase in the remobilization of stored NSC from SPS to the grain (RASN) and 15.86%-73.30% increase in remobilization percentage of removed NSC from SPS to the grain (RPRN). The effect of shading stress on remobilization differed between sites and varieties. Owing to a greater sink capacity, shading stress led to a higher RASN and RPRN from heading to DAH20 for ‘Huanghuazhan’ in Hanyuan. To compensate for photosynthate deficiency under shading stress, rice is adapted to remobilize stored NSC during early grain filling stages. Consequently, grain yield loss caused by shading could be reduced by increasing the SPS remobilization ability (especially in low light areas). Increasing NSC accumulation in SPS before heading for later remobilization may be a feasible way to alleviate rice yield loss under adverse light conditions.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.81 n.3 20212021-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000300300en10.4067/S0718-58392021000300300 |
| institution |
Scielo Chile |
| collection |
Scielo Chile |
| language |
English |
| topic |
Nonstructural carbohydrates Oryza sativa remobilization characteristics shading stress yield |
| spellingShingle |
Nonstructural carbohydrates Oryza sativa remobilization characteristics shading stress yield Zeng,Yuling Li,Qiuping Chen,Hong Li,Bo Zhong,Xiaoyuan Li,Zhenzhen Lu,Hui Wang,Li Ren,Wanjun Deng,Fei Shading stress after heading enhances the remobilization of nonstructural carbohydrates in rice under different ecological conditions |
| description |
ABSTRACT Low light levels during rice (Oryza sativa L.) growing seasons may lead to significant reductions in grain yield and quality. The effect of shading stress on remobilization of nonstructural carbohydrates (NSC) from the stem plus sheath (SPS) to the grain, a process crucial to rice grain formation, was investigated. Field shading experiments were conducted in Hanyuan and Wenjiang, China, using two rice varieties (Huanghuazhan and Guichao II) subjected to shading stress after heading. Stored NSC of 60.00-159.15 g m-2 were remobilized from SPS after heading, contributing 9.63%-23.63% to grain dry weight at maturity. Shading stress resulted in the 23.99%-50.30% and 31.65%-61.33% reduction in NSC content of SPS at 20 d after heading (DAH20) and maturity stages, respectively. This contributed to the 13.80%-89.00% increase in the remobilization of stored NSC from SPS to the grain (RASN) and 15.86%-73.30% increase in remobilization percentage of removed NSC from SPS to the grain (RPRN). The effect of shading stress on remobilization differed between sites and varieties. Owing to a greater sink capacity, shading stress led to a higher RASN and RPRN from heading to DAH20 for ‘Huanghuazhan’ in Hanyuan. To compensate for photosynthate deficiency under shading stress, rice is adapted to remobilize stored NSC during early grain filling stages. Consequently, grain yield loss caused by shading could be reduced by increasing the SPS remobilization ability (especially in low light areas). Increasing NSC accumulation in SPS before heading for later remobilization may be a feasible way to alleviate rice yield loss under adverse light conditions. |
| author |
Zeng,Yuling Li,Qiuping Chen,Hong Li,Bo Zhong,Xiaoyuan Li,Zhenzhen Lu,Hui Wang,Li Ren,Wanjun Deng,Fei |
| author_facet |
Zeng,Yuling Li,Qiuping Chen,Hong Li,Bo Zhong,Xiaoyuan Li,Zhenzhen Lu,Hui Wang,Li Ren,Wanjun Deng,Fei |
| author_sort |
Zeng,Yuling |
| title |
Shading stress after heading enhances the remobilization of nonstructural carbohydrates in rice under different ecological conditions |
| title_short |
Shading stress after heading enhances the remobilization of nonstructural carbohydrates in rice under different ecological conditions |
| title_full |
Shading stress after heading enhances the remobilization of nonstructural carbohydrates in rice under different ecological conditions |
| title_fullStr |
Shading stress after heading enhances the remobilization of nonstructural carbohydrates in rice under different ecological conditions |
| title_full_unstemmed |
Shading stress after heading enhances the remobilization of nonstructural carbohydrates in rice under different ecological conditions |
| title_sort |
shading stress after heading enhances the remobilization of nonstructural carbohydrates in rice under different ecological conditions |
| publisher |
Instituto de Investigaciones Agropecuarias, INIA |
| publishDate |
2021 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000300300 |
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