Low nitrogen stress regulates chlorophyll fluorescence in coordination with photosynthesis and Rubisco efficiency of rice

Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology
Aadil Yousuf TantrayAltaf Ahmad

Abstract

Nitrogen (N) is the basis of plant growth and development and, is considered as one of the priming agents to elevate a range of stresses. Plants use solar radiations through photosynthesis, which amasses the assimilatory components of crop yield to meet the global demand for food. Nitrogen is the main regulator in the allocation of photosynthetic apparatus which changes of the photosynthesis (Pn) and quantum yield (Fv/Fm) of the plant. In the present study, dynamics of the photosynthetic establishment, N-dependent relation with chlorophyll fluorescence attributes and Rubisco efficacy was evaluated in low-N tolerant (cv. CR Dhan 311) and low-N sensitive (cv. Rasi) rice cultivars under low-N and optimum-N conditions. There was a decrease in the stored leaf N under low-N condition, resulting in the decreased Pn and Fv/Fm efficiency of the plants through depletion in the activity and content of Rubisco. The Pn and Fv/Fm followed the parallel trend of leaf N content during low-N condition along with depletion of intercellular CO2 concentration and overall conductance under low-N condition. Photosynthetic saturation curve cleared abrupt decrease of effective quantum yield in the low-N sensitive rice cultivar than the low-N tolerant r...Continue Reading

References

Apr 30, 2014·Nature Genetics·Hongying SunXiangdong Fu
May 9, 2014·Plant Physiology and Biochemistry : PPB·Hazem M KalajiVasilij Goltsev
Aug 16, 2014·Plant, Cell & Environment·Elizabete Carmo-SilvaMartin A J Parry
Nov 28, 2014·Journal of Experimental Botany·Maxwell A WareAlexander V Ruban
May 22, 2018·Frontiers in Plant Science·Xiujie ZhouFei Liu

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