Mechanism associated with nonstructural carbohydrate accumulation in submergence tolerant rice ( Oryza sativa L.) cultivars

Journal of plant interactions

article

Debabrata Panda¹  Ramani Kumar Sarkar¹ 

[1] Division of Biochemistry, Plant Physiology and Environmental Sciences, Central Rice Research Institute Cuttack 753 006

关键词: nonstructural carbohydrate;    photosynthesis;    rice;    submergence tolerance;   

DOI  :  10.1080/17429145.2012.763000

学科分类：纳米科学和纳米技术

来源: Taylor & Francis

【 摘 要 】

Nonstructural carbohydrate (NSC) accumulation in submergence tolerant rice cultivars (cv) was studied in six Indica rice [Oryza sativa (L.)] cv under control and simulated submerged conditions. Tolerant cultivars accumulated greater contents of NSC compared to the susceptible cultivars. Starch and total NSC content showed significant positive association with survival percentage. On the other hand, elongation due to submergence was significantly a negative association with survival. The CO2 photosynthetic rate, chlorophyll content, maximum photochemical efficiency of PS II (Fv/Fm), and activities of Rubisco were not significantly different between tolerant and susceptible cv under control condition. The ADP glucose pyrophosphorylase (AGPPase) activity was significantly higher in the tolerant cv and was a positive association with starch/NSC, whereas Fructose 1,6-diphosphatase (FDPase) activity was significantly higher in susceptible cv compared to tolerant cv and was a negative association with starch/NSC. Greater activities of AGPPase along with lower activities of FDPase might facilitate greater accumulation of NSC in tolerant rice cultivars.

【 授权许可】

CC BY|CC BY-NC