Open Access
ARTICLE
Allantoin Alleviates Seed Germination Thermoinhibition in Arabidopsis
Songbei Ying, Sasa Jing, Leheng Cheng, Haiqing Sun, Yuan Tian, Lulu Zhi, Ping Li*
Shanghai Key Laboratory of Bio-Energy Crops, Research Center for Natural Products, Plant Science Center, School of Life Sciences, Shanghai University, Shanghai, 200444, China
* Corresponding Author: Ping Li. Email:
Phyton-International Journal of Experimental Botany 2022, 91(9), 1893-1904. https://doi.org/10.32604/phyton.2022.022679
Received 21 March 2022; Accepted 06 April 2022; Issue published 13 May 2022
Abstract
Allantoin as the metabolite of purine catabolism can store and remobilize nitrogen for plant growth and development. However, emerging evidence suggests it also contributes to plant tolerance to stress response through altering abscisic acid (ABA) and reducing reactive oxygen species (ROS) level. 1-CYS PEROXIREDOXIN (PER1) is a seed-specific antioxidant that enhances seed longevity through scavenging ROS over-accumulation. High temperature (HT) suppresses seed germination and induces seed secondary dormancy, called as seed germination thermoinhibition. However, the mechanism that allantoin and
PER1 regulate seed germination thermoinhibition remains unknown. In this study, we reported that allantoin treatment enhances seed germination under HT stress. Consistently, the
aln mutants displayed higher seed germination, as well as more accumulation of endogenous allantoin, than that of wild-type control. Further biochemical and genetic analyses showed that allantoin reduces ABA content under HT, and allantoin targets
PER1 to efficiently scavenge HT-induced ROS accumulation, meanwhile, the function of allantoin requires
PER1 during seed gemination thermotolerance. Collectively, our finding proposes a novel function of allantoin in enhancing seed germination tolerance to HT, and uncovers the underlying mechanism by which allantoin regulates seed germination through altering ABA metabolism and
PER1-mediated ROS level under HT stress.
Keywords
Supplementary Material
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Cite This Article
Ying, S., Jing, S., Cheng, L., Sun, H., Tian, Y. et al. (2022). Allantoin Alleviates Seed Germination Thermoinhibition in
Arabidopsis.
Phyton-International Journal of Experimental Botany, 91(9), 1893–1904.