Effects of experimental warming on the growth and stoichiometrical characteristics of two dominant species (<i>Kobresia pygmaea</i> and <i>Kobresia tibetica</i>) in alpine meadow of the Tibetan Plateau

Ahui, 彭阿辉 Peng; Genxu, 王根绪 Wang; Yong, Yang; Yao, 肖瑶 Xiao; Li, 张莉 Zhang; Yan, 杨燕 Yang

doi:10.5846/stxb201606161173

Acta Eco Sin

2017

DOI: 10.5846/stxb201606161173

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Effects of experimental warming on the growth and stoichiometrical characteristics of two dominant species (Kobresia pygmaea and Kobresia tibetica) in alpine meadow of the Tibetan Plateau

彭阿辉 Peng Ahui¹,

王根绪 Wang Genxu²,

Yang Yong³

et al.

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Physiological response of Kobresia pygmaea to temperature changes on the Qinghai-Tibet Plateau

et al. 2022

BMC Plant Biol

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Background The Qinghai-Tibetan Plateau is experiencing rapid climate warming, which may further affect plant growth. However, little is known about the plant physiological response to climate change. Results Here, we select the Kobresia pygmaea, an important perennial Cyperaceae forage, to examine the physiological indices to temperature changes in different growing months. We determined the contents of malondialdehyde, proline, soluble sugars, superoxide dismutase, peroxidation, and catalase activity in leaves and roots of Kobresia pygmaea at 25℃, 10℃, 4℃ and 0℃ from June to September in 2020. The results showed that the content of osmotic adjustment substances in the leaves and roots of Kobresia pygmaea fluctuated greatly with experimental temperature in June and September. The superoxide dismutase activity in the leaves and roots of the four months changed significantly with temperatures. The peroxidation activity in the leaves was higher than that in the roots, while the catalase activity in leaves and roots fluctuates greatly during June, with a relative stable content in other months. Membership function analysis showed that higher temperatures were more harmful to plant leaves, and lower temperatures were more harmful to plant roots. The interaction of organs, growing season and stress temperature significantly affected the physiological indicators. Conclusions The physiological indicators of Kobresia pygmaea can actively respond to temperature changes, and high temperature can reduce the stress resistance Kobresia pygmaea. Our findings suggest that the Kobresia pygmaea has high adaptability to climate warming in the future.

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Physiological response of Kobresia pygmaea to temperature changes on the Qinghai-Tibet Plateau

et al. 2022

BMC Plant Biol

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Effects of experimental warming on the growth and stoichiometrical characteristics of two dominant species (Kobresia pygmaea and Kobresia tibetica) in alpine meadow of the Tibetan Plateau

Cited by 1 publication

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Physiological response of Kobresia pygmaea to temperature changes on the Qinghai-Tibet Plateau

Physiological response of Kobresia pygmaea to temperature changes on the Qinghai-Tibet Plateau

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