PMID- 34646287
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20230921
IS  - 1664-462X (Print)
IS  - 1664-462X (Electronic)
IS  - 1664-462X (Linking)
VI  - 12
DP  - 2021
TI  - Melatonin Alleviates Low-Temperature Stress via ABI5-Mediated Signals During Seed 
      Germination in Rice (Oryza sativa L.).
PG  - 727596
LID - 10.3389/fpls.2021.727596 [doi]
LID - 727596
AB  - With increasing areas of direct sowing, low-temperature (LT) stress drastically 
      affects global rice production. Exogenous applications of melatonin (MT) serve as 
      one of the effective ways to improve seed germination under various stress 
      conditions. In this study, we found that MT treatment greatly improved the LT 
      stress-induced loss of germination percentage and the weak performance of 
      seedlings under LT of constant 20 degrees C (LT20). This was largely dependent on the 
      activated antioxidant system and enhanced activities of storage substance 
      utilization-associated enzymes. Moreover, we also detected that exogenous feeding 
      of MT significantly increased the biosynthesis of gibberellin (GA) and endogenous 
      MT but simultaneously inhibited the accumulation of abscisic acid (ABA) and 
      hydrogen peroxide (H(2)O(2)) under LT20 stress. These results suggested that MT 
      had antagonistic effects on ABA and H(2)O(2). In addition, MT treatment also 
      significantly enhanced the expression of CATALYSE 2 (OsCAT2), which was directly 
      regulated by ABA-INSENSITIVE 5 (OsABI5), a core module of ABA-stressed signals, 
      and thus promoting the H(2)O(2) scavenging to reach reactive oxygen species (ROS) 
      homeostasis, which consequently increased GA biosynthesis. However, in abi5 
      mutants, OsCAT2 failed in response to LT20 stress irrespective of MT treatment, 
      indicating that OsABI5 is essential for MT-mediated seed germination under LT20 
      stress. Collectively, we now demonstrated that MT showed a synergistic 
      interaction with an ABI5-mediated signal to mediate seed germination, partially 
      through the direct regulation of OsCAT2.
CI  - Copyright (c) 2021 Li, Jiang, Song and Zhang.
FAU - Li, Ruiqing
AU  - Li R
AD  - College of Agronomy, Anhui Agricultural University, Hefei, China.
AD  - State Key Laboratory of Rice Biology and Chinese National Center for Rice 
      Improvement, China National Rice Research Institute, Hangzhou, China.
FAU - Jiang, Meng
AU  - Jiang M
AD  - National Key Laboratory of Rice Biology, Institute of Crop Sciences, Zhejiang 
      University, Hangzhou, China.
FAU - Song, Yue
AU  - Song Y
AD  - National Key Laboratory of Rice Biology, Institute of Crop Sciences, Zhejiang 
      University, Hangzhou, China.
FAU - Zhang, Huali
AU  - Zhang H
AD  - State Key Laboratory of Rice Biology and Chinese National Center for Rice 
      Improvement, China National Rice Research Institute, Hangzhou, China.
LA  - eng
PT  - Journal Article
DEP - 20210927
PL  - Switzerland
TA  - Front Plant Sci
JT  - Frontiers in plant science
JID - 101568200
PMC - PMC8502935
OTO - NOTNLM
OT  - ABI5
OT  - low temperature
OT  - melatonin
OT  - rice
OT  - seed germination
COIS- The authors declare that the research was conducted in the absence of any 
      commercial or financial relationships that could be construed as a potential 
      conflict of interest.
EDAT- 2021/10/15 06:00
MHDA- 2021/10/15 06:01
PMCR- 2021/01/01
CRDT- 2021/10/14 06:34
PHST- 2021/06/19 00:00 [received]
PHST- 2021/08/30 00:00 [accepted]
PHST- 2021/10/14 06:34 [entrez]
PHST- 2021/10/15 06:00 [pubmed]
PHST- 2021/10/15 06:01 [medline]
PHST- 2021/01/01 00:00 [pmc-release]
AID - 10.3389/fpls.2021.727596 [doi]
PST - epublish
SO  - Front Plant Sci. 2021 Sep 27;12:727596. doi: 10.3389/fpls.2021.727596. 
      eCollection 2021.