Home About Browse Search
Svenska


Exogenous calcium alleviates nocturnal chilling-induced feedback inhibition of photosynthesis by improving sink demand in peanut (Arachis hypogaea)

Wu, Di and Liu, Yifei and Pang, Jiayin and Yong, Jean W.H and Chen, Yinglong and Bai, Chunming and Han, Xiaori and Liu, Xinyue and Sun, Zhiyu and Zhang, Siwei and Sheng, Jing and Li, Tianlai and Siddique, Kadambot H. M. and Lambers, Hans (2020). Exogenous calcium alleviates nocturnal chilling-induced feedback inhibition of photosynthesis by improving sink demand in peanut (Arachis hypogaea). Frontiers in Plant Science. 11 , 607029
[Journal article]

[img] PDF
3MB

Abstract

Arachis hypogaea (peanut) is a globally important oilseed crop with high nutritional value. However, upon exposure to overnight chilling stress, it shows poor growth and seedling necrosis in many cultivation areas worldwide. Calcium (Ca2+) enhances chilling resistance in various plant species. We undertook a pot experiment to investigate the effects of exogenous Ca2+ and a calmodulin (CaM) inhibitor on growth and photosynthetic characteristics of peanut exposed to low night temperature (LNT) stress following warm sunny days. The LNT stress reduced growth, leaf extension, biomass accumulation, gas exchange rates, and photosynthetic electron transport rates. Following LNT stress, we observed larger starch grains and a concomitant increase in nonstructural carbohydrates and hydrogen peroxide (H2O2) concentrations. The LNT stress further induced photoinhibition and caused structural damage to the chloroplast grana. Exogenous Ca2+ enhanced plant growth following LNT stress, possibly by allowing continued export of carbohydrates from leaves. Foliar Ca2+ likely alleviated the nocturnal chilling-dependent feedback limitation on photosynthesis in the daytime by increasing sink demand. The foliar Ca2+ pretreatment protected the photosystems from photoinhibition by facilitating cyclic electron flow (CEF) and decreasing the proton gradient (ΔpH) across thylakoid membranes during LNT stress. Foliar application of a CaM inhibitor increased the negative impact of LNT stress on photosynthetic processes, confirming that Ca2+–CaM played an important role in alleviating photosynthetic inhibition due to the overnight chilling-dependent feedback.

Authors/Creators:Wu, Di and Liu, Yifei and Pang, Jiayin and Yong, Jean W.H and Chen, Yinglong and Bai, Chunming and Han, Xiaori and Liu, Xinyue and Sun, Zhiyu and Zhang, Siwei and Sheng, Jing and Li, Tianlai and Siddique, Kadambot H. M. and Lambers, Hans
Title:Exogenous calcium alleviates nocturnal chilling-induced feedback inhibition of photosynthesis by improving sink demand in peanut (Arachis hypogaea)
Series Name/Journal:Frontiers in Plant Science
Year of publishing :2020
Volume:11
Article number:607029
Number of Pages:14
ISSN:1664-462X
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Horticulture
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Botany
Keywords:low night temperature, growth, calcium, photosynthesis, peanut
URN:NBN:urn:nbn:se:slu:epsilon-p-108686
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-108686
Additional ID:
Type of IDID
DOI10.3389/fpls.2020.607029
Web of Science (WoS)000604297200001
ID Code:21796
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Biosystems and Technology (from 130101)
Deposited By: SLUpub Connector
Deposited On:29 Jan 2021 15:03
Metadata Last Modified:29 Jan 2021 15:11

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits