Effects of humic acid on photosynthetic efficiency of rapeseed plants growing under different watering conditions

被引：62

作者：

Lotfi, R. ^{[1
]}

Kalaji, H. M. ^{[2
]}

Valizadeh, G. R. ^{[1
]}

Behrozyar, E. Khalilvand ^{[3
]}

Hemati, A. ^{[4
]}

Gharavi-Kochebagh, P. ^{[5
]}

Ghassemi, A. ^{[3
]}

机构：

[1] Dryland Agr Res Inst, AREEO, Maragheh, Iran

[2] Inst Technol & Life Sci ITP, Al Hrabska 3, PL-05090 Raszyn, Poland

[3] Islamic Azad Univ, Dept Agron & Plant Breeding, Tabriz Branch, Tabriz, Iran

[4] Univ Tabriz, Dept Soil Sci, Fac Agr, Tabriz, Iran

[5] Univ Tabriz, Dept Plant Ecophysiol, Fac Agr, Tabriz, Iran

来源：

PHOTOSYNTHETICA | 2018年 / 56卷 / 03期

关键词：

chlorophyll a fluorescence; photosynthesis; water stress; CHLOROPHYLL-A FLUORESCENCE; PHOTOSYSTEM-I CONTENT; PHYSIOLOGICAL-RESPONSES; ELECTRON-TRANSPORT; DROUGHT STRESS; BRASSICA-NAPUS; WHEAT LEAVES; RISE; TEMPERATURE; MECHANISMS;

D O I：

10.1007/s11099-017-0745-9

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Water is a limited resource and is likely to become even more restricted with climate change. The aim of this study was to evaluate the effect of humic acid (HA) applications on photosynthesis efficiency of rapeseed plants under different watering conditions. Water stress strongly increased electron transport flux, probability that trapped excitation can move an electron into the electron transport chain beyond Q(A), and quantum yield of reduction of end electron acceptors at the PSI acceptor side. Application of HA decreased the values of these parameters to be similar to those of non-stress conditions. We found that, the application of HA improved plants net photosynthesis under water stress via increasing the rate of gas exchange and electron transport flux in plants.

引用

页码：962 / 970

页数：9

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