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Research article - Peer-reviewed, 2020

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

Abstract

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.

Keywords

peanut; low nocturnal temperature; growth; calcium; photosynthesis

Published in

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

Authors' information

Song, Qiaobo
Shenyang Agricultural University
Liu, Yifei
Shenyang Agricultural University
Pang, Jiayin
University of Western Australia
University of Western Australia
Swedish University of Agricultural Sciences, Department of Biosystems and Technology
Chen, Yinglong
University of Western Australia
Bai, Chunming
Liaoning Academy of Agricultural Sciences
Gille, Clément
University of Western Australia
Shi, Qingwen
Shenyang Agricultural University
Wu, Di
Shenyang Agricultural University
Han, Xiaori
Shenyang Agricultural University
Li, Tianlai
Shenyang Agricultural University
Siddique, Kadambot H.M.
University of Western Australia
Lambers, Hans
University of Western Australia

UKÄ Subject classification

Botany
Horticulture
Soil Science

Publication Identifiers

DOI: https://doi.org/10.3389/fpls.2019.01637

URI (permanent link to this page)

https://res.slu.se/id/publ/102698