| Effects of water stress on photosystem Ⅱ in tomato |
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| DOI：10.7606/j.issn.1000-7601.2009.01.32 |
| Key Words: tomato chlorophyll fluorescence parameter water stress JIP-test |
| Author Name | Affiliation | | FENG Shengli | Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan Shihezi University, Shihezi,Xinjiang 832003,China；Agricultural Bureau of Shanshan,Shanshan,Xinjiang 838200,China | | MA Fuyu | Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan Shihezi University, Shihezi,Xinjiang 832003,China | | FANG Zhigang | Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan Shihezi University, Shihezi,Xinjiang 832003,China | | WANG Jichuan | Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan Shihezi University, Shihezi,Xinjiang 832003,China |
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| Abstract: |
| Experiments were made to study the effect of water stress on changes of chlorophyll fluorescence parameter of tomota by applying the chlorophyll fluorescence technique.The results indicated that,along with the decrease of soil moisture,all the maximal recorded fluorescence intensity (Fm),the ratio of variable to maximum fluorescence (Fv/Fm),yields or fluxs ratios(φPo、ψo and φEo),phenomenological energy fluxes per CS(RC/CSM、ABS/CSM、TRO/CSM and ETO/CSM),dissipated energy flux per RC(DIO/RC), density of RCs(RC/CSM), performance indexes(PIABS and PICSM),(DFABS)decreased,minimal recorded fluorescence intensity(Fo), quantum yield for energy dissipation(φDo),dissipated energy flux per CS(DIO/CSM),per QA-reducing PSII reaction center(ABS/RC and DIO/RC) increased.Among the numerous JIP-test expression,performance indexes(PIABS and PICSM) and driving forces(DFABS)were the most sensitive.All results indicated that under water stress tomato leavers appeared light inhibition,inactivation of reaction centers and inhibition of the electron transport at the acceptor side of PSII.Performance indexes(PIABS) and driving forces(DFABS) were used as targets of light inhibition. |
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