Impeded Carbohydrate Metabolism in Rice Plants under Submergence Stress

来源 :Rice Science | 被引量 : 0次 | 上传用户:you3880066
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The detrimental effects of submergence on physiological performances of some rice varieties with special references to carbohydrate metabolisms and their allied enzymes during post-flowering stages have been documented and clarified in the present investigation. It was found that photosynthetic rate and concomitant translocation of sugars into the panicles were both related to the yield. The detrimental effects of the complete submergence were recorded in generation of sucrose, starch, sucrose phosphate synthase and phosphorylase activity in the developing panicles of the plants as compared to those under normal or control (i.e. non-submerged) condition. The accumulation of starch was significantly lower in plants under submergence and that was correlated with ADP-glucose pyrophosphorylase activity. Photosynthetic rate was most affected under submergence in varying days of post-flowering and was also related to the down regulation of Ribulose bisphosphate carboxylase activity. However, under normal or control condition, there recorded a steady maintenance of photosynthetic rate at the post-flowering stages and significantly higher values of Ribulose bisphosphate carboxylase activity. Still, photosynthetic rate of the plants under both control and submerged conditions had hardly any significant correlation with sugar accumulation and other enzymes of carbohydrate metabolism like invertase with grain yield. Finally, plants under submergence suffered significant loss of yield by poor grain filling which was related to impeded carbohydrate metabolism in the tissues. It is evident that loss of yield under submergence is attributed both by lower sink size or sink capacity (number of panicles, in this case) as well as subdued carbohydrate metabolism in plants and its subsequent partitioning into the grains. The detrimental effects of submergence on physiological performances of some rice varieties with special references to carbohydrate-metabolisms and their allied enzymes during post-flowering stages have been documented and clarified in the present investigation. It was found that photosynthetic rate and concomitant translocation of sugars into the The detrimental effects of the complete submergence were recorded in generation of sucrose, starch, sucrose phosphate synthase and phosphorylase activity in the developing panicles of the plants as compared to those under normal or control (ie non-submerged The accumulation of starch was significantly lower in plants under submergence and that was correlated with the ADP-glucose pyrophosphorylase activity. Photosynthetic rate was most affected under submergence in varying days of post-flowering and was also related to the down regulation of Ribulose bisphosphate carboxylase activity. However, under normal or control condition, there recorded a steady maintenance of photosynthetic rate at the post-flowering stages and significantly higher values ​​of Ribulose bisphosphate carboxylase activity. Still, photosynthetic rate of the plants under both control and submerged conditions had hardly any significant correlation with sugar Finally, plants under submergence suffered significant loss of yield by poor grain filling which was related to impeded carbohydrate metabolism in the tissues. It is evident that loss of yield under submergence is attributed both by lower sink size or sink capacity (number of panicles, in this case) as well as subdued carbohydrate metabolism in plants and its subsequent partitioning into the grains.
其他文献
目的 探讨苗勒管囊肿的诊断和治疗方法.方法 回顾性分析1993年1月至2007年12月诊治的48例苗勒管囊肿患者资料.1993年1月至1997年12月共诊治8例,多因慢性前列腺炎症状就诊并行
烟水配套工程是改善农村基础设施建设,解决农村"七难"问题的惠民工程,是落实工业反哺农业,为民办实事、办好事的具体体现.也是解决石柱县烤烟烟叶单产较低、质量欠佳,烤烟产
特色、优质、效益农业是现代农业的重要体现.本文认为特色农业强调的是"人无我有",优质农业突出的是"人有我优",高效农业追求的是"人优我强".特色、优质、高效农业是一个有机
生态和文化因素对农作物品种的选育和分布起着十分重要的影响.本研究利用稻作品种的空间分布数据库,探讨了云南地区稻作品种多样性的分布中心及其与生态、文化因素之间的联系
本文介绍了光纤电压互感器的基本原理,针对实际工程应用中的问题,论述了光学参数在环境条件下变化引起的测量精度等关键技术问题,并给出了具体的解决方案.最后给出了光纤电压
本文主要论述了沼肥在农业植保生态系统中的重要性,阐述了沼肥的作用,指出了沼气的普及和推广有利于农业的发展。沼肥的存在和合理运用,不仅解决了农村生活的用能不足,而且还
Employing the Unit Soil Carbon Amount (USCA) approach, soil carbon storage was calculated across the Northeast Plain of China based on the Multi-purpose Regiona
本文通过秋季采用套网法对东海区桁杆拖虾网的选择性试验,对桁杆拖虾网的3种网囊网目尺寸进行了分析研究,结果表明:当网囊网目尺寸为30mm、35mm和50mm时,哈氏仿对虾的50%选择
目的 探讨心理疏导对护士身心健康的影响.方法 将60名护士随机分为实验组和对照组各30名,实验组根据护士情况给予心理疏导,对照组不做任何干预.比较心理疏导前后两组护士身心
目的:探讨对精神科患者实施小组健康教育对本科护生临床实践能力的影响.方法:选取2010年1月~2011年1月在我院精神科实习本科护生86名,按学校分组情况将所有护生随机分成实验组