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Research article2020Peer reviewedOpen access

Supplementary Calcium Restores Peanut (Arachis hypogaea) Growth and Photosynthetic Capacity Under Low Nocturnal Temperature

Song, Qiaobo; Liu, Yifei; Pang, Jiayin; Yong, Jean Wan Hong; Chen, Yinglong; Bai, Chunming; Gille, Clement; Shi, Qingwen; Wu, Di; Han, Xiaori; Li, Tianlai; Siddique, Kadambot H. M.; Lambers, Hans


Peanut (Arachis hypogaea L.) is a globally important oil crop, which often experiences poor growth and seedling necrosis under low nocturnal temperatures (LNT). This study assessed the effects of supplementary calcium (Ca2+) and a calmodulin inhibitor on peanut growth and photosynthetic characteristics of plants exposed to LNT, followed by recovery at a higher temperature. We monitored key growth and photosynthetic parameters in a climate-controlled chamber in pots containing soil. LNT reduced peanut growth and dry matter accumulation, enhanced leaf nonstructural carbohydrates concentrations and non-photochemical quenching, decreased the electron transport rate, increased the transmembrane proton gradient, and decreased gas exchange rates. In peanuts subjected to LNT, foliar application of Ca2+ restored growth, dry matter production and leaf photosynthetic capacity. In particular, the foliar Ca2+ application restored temperature-dependent photosynthesis feedback inhibition due to improved growth/sink demand. Foliar sprays of a calmodulin inhibitor further deteriorated the effects of LNT which validated the protective role of Ca2+ in facilitating LNT tolerance of peanuts.


peanut; low nocturnal temperature; growth; calcium; photosynthesis

Published in

Frontiers in Plant Science
2020, Volume: 10, article number: 1637

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    Soil Science

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