...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Pakistan journal of botany >Individual and combined effect of terminal drought and heat stress on allometric growth, grain yield and quality of bread wheat
【24h】

Individual and combined effect of terminal drought and heat stress on allometric growth, grain yield and quality of bread wheat

机译：末端干旱的个体和综合效应和热胁迫对同类生长，籽粒产量和面包小麦品质

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Among the abiotic stresses, terminal drought and heat stress are two critical threats to crop production worldwide. The objective of this study was to quantify the separate and combined effects of drought and heat stress (during heading and grain-filling stages) on allometric growth, yield, yield components, grain characteristics and grain quality of bread wheat. Experimental treatments were comprised of control (well-watered/normal condition), drought stress (50% field capacity), heat stress (inside the plastic tunnel) and drought + heat (50% field capacity and inside the plastic tunnels). Heat and drought + heat were found to have a much greater influence on the leaf area index, leaf area duration, crop growth rate and net assimilation of wheat plants than drought stress alone and control treatment. More reduction in yield and yield components of wheat was noted where combined stress (drought and heat) was applied. Moreover, heat and heat+drought stress reduced both the grain growth duration and the grain growth rate that decreased the 100 grain weight of wheat. A significant reduction in chlorophyll contents while higher concentration of proline and soluble protein of flag leaf over control was observed after drought heat stress treatment. In addition, quality traits of wheat grain were significantly affected under drought, heat and drought +heat stress conditions. Heat and drought+heat decreased the starch contents of grain while protein and gluten contents were predominantly increased under heat or drought + heat stress than drought alone and control treatment. It was concluded that effect of simultaneously applied drought and heat stress is more severe as compared to individual effect drought and heat stress.
机译：在非生物应激中，末端干旱和热应激是全球作物生产的两个关键威胁。本研究的目的是量化干旱和热应激（在标题和灌浆阶段期间）的单独和综合作用对面包小麦的各种生长，产量，产量组分，晶粒特征和粒度质量。实验处理由对照（含水良好/正常情况），干旱胁迫（50％的田间容量），热应力（塑料隧道内）和干旱+热量（50％的田间容量和塑料隧道内）组成。发现热量和干旱+热量对小麦植物的叶面积指数，叶面积，作物生长速率和净同化产生了更大的影响，而不是单独的干旱胁迫和对照治疗。注意到小麦产率和产量组分的更多降低，其中施加组合应力（干旱和热量）。此外，热量和热+干旱胁迫降低了晶粒生长持续时间和晶粒生长速率，降低了粒度的100粒重量的小麦。在干旱热应激处理后观察到叶绿素含量的显着降低，同时观察到旗叶叶片上的葡萄叶和可溶性蛋白质的葡萄球菌和可溶性蛋白质。此外，在干旱，热量和干旱+热应激条件下，小麦籽粒的质量性状受到显着影响。热量和干旱+热量降低了颗粒的淀粉含量，而蛋白质和麸质含量主要在热量或干旱+热应激中增加而不是单独的干旱和对照处理。结论是，与个体效果干旱和热应激相比，同时施加的干旱和热应激的影响更为严重。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号