Photo-protective mechanisms in reed canary grass to alleviate photo-inhibition of PSII on the Qinghai-Tibet Plateau.

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2017
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Abstract
Due to its characteristic of high biomass yield potential, there is considerable interest in cultivating Phalaris arundinacea L. cv. 'chuancaoyin No.3' (reed canary grass) on the Qinghai-Tibet Plateau where there is an abundance of alpine steppe meadow and a potential large market for animal husbandry. In this study, we 1) investigate whether reed canary grass exhibits superior productive capacity to Elymus nutans 'Aba' (E. nutans), ordinary common pasture, during the long warm days of summer at high-altitude; and 2) compare the cold tolerance between reed canary grass and E. nutans, including photosynthesis, photo-inhibition, and photo-protection. The results suggest that reed canary grass exhibits higher photosynthetic capacity compared to E. nutans at latitudes of the cool temperate zone. Meanwhile, cold-induced photo-inhibition and photo-damage at high altitudes in reed canary grass were due to both stomatal and non-stomatal limitation, and the enhancement in photo-respiration, thermal dissipation, and Mehler reaction are important processes to minimize the negative effects of high elevation and a cold environment.
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Authors Zhang, Chao;Zhang, Da-Wei;Sun, Yan-Ni;Arfan, Muhammad;Li, Da-Xu;Yan, Jia-Jun;You, Ming-Hong;Bai, Shi-Qie;Lin, Hong-Hui;
Journal Journal of plant physiology
Year 2017
DOI
S0176-1617(17)30120-7
URL
Keywords
high altitude chlorophyll fluorescence gas exchange photo-inhibition photo-protection reed canary grass

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