外源ABA对干旱胁迫下玉米叶片光合能力及气孔开度的影响

doi:10.11924/j.issn.1000-6850.casb18110062

中国农学通报 ›› 2019, Vol. 35 ›› Issue (13): 31-35.doi: 10.11924/j.issn.1000-6850.casb18110062

所属专题：生物技术；玉米；农业气象

外源ABA对干旱胁迫下玉米叶片光合能力及气孔开度的影响

郭金生¹, 曹丽茹¹, 鲁晓民¹, 张新², 张前进², 魏良明², 王振华²

1.河南省农业科学院粮食作物研究所;2.河南省农业科学院粮食作物研究所

收稿日期:2018-11-16 修回日期:2018-12-17 接受日期:2018-12-24 出版日期:2019-05-05 发布日期:2019-05-05
通讯作者: 鲁晓民
基金资助:
国家玉米产业技术体系(CARS-02-08);河南省基础与前沿技术研究计划项目(162300410178)；河南省重大科技专项(161100110500-0102)

Effects on Photosynthetic Capacity and Stomatal Opening of Maize Leaves: Exogenous ABA Under Drought Stress

Received:2018-11-16 Revised:2018-12-17 Accepted:2018-12-24 Online:2019-05-05 Published:2019-05-05

摘要/Abstract

摘要： 为探究旱胁迫下外源ABA对玉米品种叶片光合作用以及气孔开度的影响情况，以玉米品种‘郑单988’为研究对象，采用PEG、ABA、ABA+PEG不同处理对不同时间节点下玉米苗期叶片光合作用、气孔张开程度和叶绿素含量变化进行研究。发现不同处理下3 个时间节点光合速率、蒸腾速率、气孔导度和叶绿素含量均低于对照，而气孔闭合数目均高于对照；ABA+PEG处理的4 个指标均处于PEG和ABA处理之间。说明干旱胁迫下玉米为了维持自身的生长发育，通过关闭气孔减少水分蒸腾；外施ABA可增加干旱胁迫下气孔的关闭数目和叶绿素含量，减少水分流失的同时提高旱胁迫下植株的光合速率，最终提高植株的抗旱能力。

关键词: 盐碱地, 盐碱地, 油葵, 水盐运移

Abstract: This study is to investigate the effects of exogenous ABA on photosynthesis and stomatal opening of maize leaves under drought stress. The excellent maize variety ‘Zhengdan 988’ was used as the material, the changes of photosynthesis, stomatal opening and chlorophyll content of maize seedlings at different time points were studied under PEG treatment, exogenous ABA treatment and ABA+PEG treatment. The results showed that the photosynthesis rate, transpiration rate, stomatal conductance and chlorophyll content of the three treatments were lower than that of CK, and the number of stomatal closure was higher than that of CK. The four indicators of ABA+PEG treatment were between PEG and ABA treatment which indicated that maize reduced transpiration by closing the stomata in order to maintain the growth and development under drought stress. Exogenous ABA can increase the number of stomatal closure and chlorophyll content under drought stress, which reduce water loss and increase the photosynthesis rate of plants under drought stress, and finally improve the drought resistance of the plants.

郭金生,曹丽茹,鲁晓民,张新,张前进,魏良明,王振华. 外源ABA对干旱胁迫下玉米叶片光合能力及气孔开度的影响[J]. 中国农学通报, 2019, 35(13): 31-35.

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外源ABA对干旱胁迫下玉米叶片光合能力及气孔开度的影响

Effects on Photosynthetic Capacity and Stomatal Opening of Maize Leaves: Exogenous ABA Under Drought Stress

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