Photosynthetic rate and chlorophyll fluorescence in leaves of stem mustard (Brassica juncea var. tsatsai) after turnip mosaic virus infection
Photosynthetic rate and chlorophyll fluorescence in leaves of stem mustard (Brassica juncea var. tsatsai) after turnip mosaic virus infection
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DOI：
10.1016/j.plantsci.2004.07.019
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发表时间：
2005-01-01
期刊：
影响因子：
5.2
通讯作者：
Rao, GZ
中科院分区：
文献类型：
--
作者：
Guo, DP;Guo, YP;Rao, GZ
研究了萝卜花叶病毒侵染芥菜（Brassica juncea var. tsatsai）植株的生长、光合气体交换和叶绿素荧光。侵染植株叶片数相近，但株重、叶面积、株高均有所下降。与对照植株相比，感染2周后植株的叶绿素含量显著降低。侵染植株的净光合速率、蒸腾速率和气孔导度降低，花间CO2浓度略高。叶绿素荧光参数Fv/Fm、Fv‘/Fm’、ETR和qP在侵染植株和对照植株之间无显著差异，但qN在侵染植株中有所降低。感染3周后，感染植株的AES总高于对照植株，这可能是导致植株生长抑制的原因之一。本实验表明，TuMV侵染引起的芥菜光合作用减少是通过一系列过程引起的，包括病害胁迫下的气孔和非气孔限制。2004爱思唯尔爱尔兰有限公司版权所有。
The growth, photosynthetic gas exchange and chlorophyll fluorescence were studied in stem mustard (Brassica juncea var. tsatsai) plants infected with turnip mosaic virus. The infected plants showed decreased plant weight, leaf area, plant height although they had similar leaf number. Chlorophyll content was significantly reduced in infected plants after 2 weeks of virus infection as compared to control plants. Decreased net photosynthetic rate, transpiration and stomatal conductance, and a slightly higher interceflular CO2 concentration were observed in infected plants. For the chlorophyll fluorescence parameter Fv/Fm, Fv'/Fm', ETR and qP, there were no differences between infected and control plants, but qN showed a reduction in infected plants. AES was always higher in infected plants than in control plants after 3 weeks of infection, which may a causal factor of plant growth suppress. From the present experiment, it is suggested that TuMV infection caused a reduction in photosynthesis in stem mustard by a series of processes, including stomatal and non-stomatal limitations during disease stress. (C) 2004 Elsevier Ireland Ltd. All rights reserved.