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Supplementary Calcium Restores Peanut (Arachis hypogaea) Growth and Photosynthetic Capacity Under Low Nocturnal Temperature
- Source :
- Frontiers in Plant Science, Vol 10 (2020)
- Publication Year :
- 2020
- Publisher :
- Frontiers Media S.A., 2020.
-
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.
- Subjects :
- peanut
low nocturnal temperature
growth
calcium
photosynthesis
Plant culture
SB1-1110
Subjects
Details
- Language :
- English
- ISSN :
- 1664462X
- Volume :
- 10
- Database :
- Directory of Open Access Journals
- Journal :
- Frontiers in Plant Science
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.61253569212e4ce8a8183c3de88cb688
- Document Type :
- article
- Full Text :
- https://doi.org/10.3389/fpls.2019.01637