首页> 美国卫生研究院文献>Annals of Botany >A Comparison of the Effects of Carbon Dioxide Concentration and Temperature on Respiration Translocation and Nitrate Reduction in Darkened Soybean Leaves
【2h】

A Comparison of the Effects of Carbon Dioxide Concentration and Temperature on Respiration Translocation and Nitrate Reduction in Darkened Soybean Leaves

机译:二氧化碳浓度和温度对深色大豆叶片呼吸转运和硝酸盐还原作用的比较

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

• Background and aims Respiration of autotrophs is an important component of their carbon balance as well as the global carbon dioxide budget. How autotrophic respiration may respond to increasing carbon dioxide concentrations, [CO2], in the atmosphere remains uncertain. The existence of short‐term responses of respiration rates of plant leaves to [CO2] is controversial. Short‐term responses of respiration to temperature are not disputed. This work compared responses of dark respiration and two processes dependent on the energy and reductant supplied by dark respiration, translocation and nitrate reduction, to changes in [CO2] and temperature.• Methods Mature soybean leaves were exposed for a single 8‐h dark period to one of five combinations of air temperature and [CO2], and rates of respiration, translocation and nitrate reduction were determined for each treatment.• Key results Low temperature and elevated [CO2] reduced rates of respiration, translocation and nitrate reduction, while increased temperature and low [CO2] increased rates of all three processes. A given change in the rate of respiration was accompanied by the same change in the rate of translocation or nitrate reduction, regardless of whether the altered respiration was caused by a change in temperature or by a change in [CO2].• Conclusions These results make it highly unlikely that the observed responses of respiration rate to [CO2] were artefacts due to errors in the measurement of carbon dioxide exchange rates in this case, and indicate that elevated [CO2] at night can affect translocation and nitrate reduction through its effect on respiration.
机译:•背景和目的呼吸自养生物是其碳平衡以及全球二氧化碳预算的重要组成部分。自养呼吸如何响应大气中不断增加的二氧化碳浓度[CO2]仍不确定。植物叶片呼吸速率对[CO2]的短期反应是否存在争议。呼吸对温度的短期反应没有争议。这项工作比较了黑暗呼吸的响应和取决于黑暗呼吸,易位和硝酸盐还原提供的能量和还原剂的两个过程对[CO2]和温度变化的响应。•方法成熟的大豆叶片暴露于单个8小时黑暗期确定每种处理的空气温度和[CO2]的五种组合之一,并确定呼吸,转运和减少硝酸盐的速率。•主要结果低温和升高的[CO2]减少了呼吸,转运和减少硝酸盐的速率,但增加了温度和较低的[CO2]速率会提高所有三个过程。既定的呼吸速率变化伴随着转运速率或硝酸盐还原速率的变化,无论呼吸变化是由温度变化还是由[CO2]变化引起的。•结论这些结果使得在这种情况下,观察到的呼吸速率对[CO2]的响应极不可能是由于二氧化碳交换速率测量错误引起的假象,并且表明夜间[CO2]升高会通过其对碳的影响而影响转运和硝酸盐还原。呼吸。

著录项

  • 期刊名称 Annals of Botany
  • 作者

    JAMES A. BUNCE;

  • 作者单位
  • 年(卷),期 2004(93),6
  • 年度 2004
  • 页码 665–669
  • 总页数 5
  • 原文格式 PDF
  • 正文语种
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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