...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plant Physiology and Biochemistry >Water use strategies and drought intensity define the relative contributions of hydraulic failure and carbohydrate depletion during seedling mortality
【24h】

Water use strategies and drought intensity define the relative contributions of hydraulic failure and carbohydrate depletion during seedling mortality

机译：用水策略和干旱强度定义苗木失效和碳水化合物耗尽过程中的相对贡献

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

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

摘要

Combining hydraulic: and carbon-related measurements can help elucidate drought-induced plant mortality. To study drought mortality mechanisms, seedlings of two woody species, including the anisohydric Robinia pseudoacacia and isohydric Quercus acutissima, were cultivated in a greenhouse and subjected to intense drought by withholding water and mild drought by adding half of the amount of daily water lost. Patterns of leaf and root gas exchange, leaf surface areas, growth, leaf and stem hydraulics, and carbohydrate dynamics were determined in drought-stressed and control seedlings. We detected a complete loss of hydraulic conductivity and partial depletion of total nonstructural carbohydrates contents (TNC) in the dead seedlings. We also found that intense drought triggered a more rapid decrease in plant water potential and a faster drop in net photosynthesis below zero, and a greater TNC loss in dead seedlings than mild drought. Additionally, anisohydric R. pseudoacacia suffered a rapider death than the isohydric Q. acutissima. Based on these findings, we propose that hydraulic conductivity loss and carbon limitation jointly contributed to drought-induced death, while the relative contributions could be altered by drought intensity. We thus believe that it is important to illustrate the mechanistic relationships between stress intensity and carbon-hydraulics coupling in the context of isohydric vs. anisohydric hydraulic strategies.
机译：结合液压：和碳相关测量可以帮助阐明干旱诱导的植物死亡率。为了研究干旱死亡机制，两种木质物种的幼苗，包括含有抗毒毒素的伪曲集和异汞栎属Acurissima，在温室中培养，并通过增加一半的日常水量丢失的一半损失的水和温和的干旱进行激烈的干旱。在干旱胁迫和对照幼苗中测定叶子和根部气体交换，叶子表面区域，生长，叶子和茎液压和碳水化合物动力学。我们检测到在死幼苗中完全丧失液压导电性和总非结构碳水化合物含量（TNC）的部分消耗。我们还发现强烈的干旱引发了植物水势的迅速减少，净光合作用速度更快，低于死亡幼苗的损失大于温和的干旱。此外，抗甲醛型伪型症患者患有抗癌死亡而不是异水Q. Acurissima。基于这些调查结果，我们提出了液压导电性损失和碳限制与干旱引起的死亡有助于，而旱灾强度可能会改变相对贡献。因此，我们认为，在异水水力液体策略中，阐述了应力强度和碳 - 液压耦合之间的机械关系非常重要。

著录项

  • 来源
    《Plant Physiology and Biochemistry》 |2020年第2020期|共13页
  • 作者

    Li Qiang; Zhao Mingming; Wang Ning; Liu Shuna; Wang Jingwen; Zhang Wenxin; Yang Ning; Fan Peixian; Wang Renqing; Wang Hui; Du Ning;

  • 作者单位

    Shandong Univ Sch Life Sci Inst Ecol &

    Biodivers 72 Binhai Rd Qingdao 266237 Peoples R China;

    Shandong Univ Sch Life Sci Inst Ecol &

    Biodivers 72 Binhai Rd Qingdao 266237 Peoples R China;

    Shandong Univ Sch Life Sci Inst Ecol &

    Biodivers 72 Binhai Rd Qingdao 266237 Peoples R China;

    Shandong Univ Sch Life Sci Inst Ecol &

    Biodivers 72 Binhai Rd Qingdao 266237 Peoples R China;

    Shandong Univ Sch Life Sci Inst Ecol &

    Biodivers 72 Binhai Rd Qingdao 266237 Peoples R China;

    Shandong Acad Forestry 42 Wenhuadong Rd Jinan 250014 Peoples R China;

    Qingdao Forestry Stn 106 Yananyi Rd Qingdao 266003 Peoples R China;

    Qingdao Forestry Stn 106 Yananyi Rd Qingdao 266003 Peoples R China;

    Shandong Univ Sch Life Sci Inst Ecol &

    Biodivers 72 Binhai Rd Qingdao 266237 Peoples R China;

    Shandong Univ Sch Life Sci Inst Ecol &

    Biodivers 72 Binhai Rd Qingdao 266237 Peoples R China;

    Shandong Univ Sch Life Sci Inst Ecol &

    Biodivers 72 Binhai Rd Qingdao 266237 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 植物生理学;植物生物化学;
  • 关键词

    Anisohydric; Carbon starvation; Hydraulic failure; Intense drought; Isohydric; Mild drought;

    机译：芳烃;碳饥饿;液压失效;强烈的干旱;异水;轻度干旱;

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