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Haiqing YIN


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Journal of Zhejiang University SCIENCE B 2021 Vol.22 No.12 P.1002-1021


Effects of gibberellin priming on seedling emergence and transcripts involved in mesocotyl elongation in rice under deep direct-seeding conditions

Author(s):  Ya WANG, Yuetao WANG, Ruifang YANG, Fuhua WANG, Jing FU, Wenbo YANG, Tao BAI, Shengxuan WANG, Haiqing YIN

Affiliation(s):  Cereal Crops Research Institute, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China; more

Corresponding email(s):   hnrice@163.com

Key Words:  Mesocotyl, Rice (Oryza sativa L.), Direct-seeding, Gibberellin, Deep sowing, Transcriptomic analysis

Ya WANG, Yuetao WANG, Ruifang YANG, Fuhua WANG, Jing FU, Wenbo YANG, Tao BAI, Shengxuan WANG, Haiqing YIN. Effects of gibberellin priming on seedling emergence and transcripts involved in mesocotyl elongation in rice under deep direct-seeding conditions[J]. Journal of Zhejiang University Science B, 2021, 22(12): 1002-1021.

@article{title="Effects of gibberellin priming on seedling emergence and transcripts involved in mesocotyl elongation in rice under deep direct-seeding conditions",
author="Ya WANG, Yuetao WANG, Ruifang YANG, Fuhua WANG, Jing FU, Wenbo YANG, Tao BAI, Shengxuan WANG, Haiqing YIN",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Effects of gibberellin priming on seedling emergence and transcripts involved in mesocotyl elongation in rice under deep direct-seeding conditions
%A Yuetao WANG
%A Ruifang YANG
%A Fuhua WANG
%A Jing FU
%A Wenbo YANG
%A Tao BAI
%A Shengxuan WANG
%A Haiqing YIN
%J Journal of Zhejiang University SCIENCE B
%V 22
%N 12
%P 1002-1021
%@ 1673-1581
%D 2021
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B2100174

T1 - Effects of gibberellin priming on seedling emergence and transcripts involved in mesocotyl elongation in rice under deep direct-seeding conditions
A1 - Ya WANG
A1 - Yuetao WANG
A1 - Ruifang YANG
A1 - Fuhua WANG
A1 - Jing FU
A1 - Wenbo YANG
A1 - Tao BAI
A1 - Shengxuan WANG
A1 - Haiqing YIN
J0 - Journal of Zhejiang University Science B
VL - 22
IS - 12
SP - 1002
EP - 1021
%@ 1673-1581
Y1 - 2021
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B2100174

mesocotyl elongation is a key trait influencing seedling emergence and establishment in direct-seeding rice cultivation. The phytohormone gibberellin (GA) has positive effects on mesocotyl elongation in rice. However, the physiological and molecular basis underlying the regulation of mesocotyl elongation mediated by GA priming under deep-sowing conditions remains largely unclear. In the present study, we performed a physiological and comprehensive transcriptomic analysis of the function of GA priming in mesocotyl elongation and seedling emergence using a direct-seeding japonica rice cultivar ZH10 at a 5-cm sowing depth. Physiological experiments indicated that GA priming significantly improved rice seedling emergence by increasing the activity of starch-metabolizing enzymes and compatible solute content to supply the energy essential for subsequent development. transcriptomic analysis revealed 7074 differentially expressed genes (false discovery rate of <0.05, |log2(fold change)| of ≥1) after GA priming. Furthermore, gene ontology (GO) and Kyoto encyclopedia of genes and genomes (KEGG) enrichment analyses revealed that genes associated with transcriptional regulation, plant hormone biosynthesis or signaling, and starch and sucrose metabolism were critical for GA-mediated promotion of rice mesocotyl elongation. Further analyses showed that the expression of the transcription factor (TF) genes (v-myb avian myeloblastosis viral oncogene homolog (MYB) alternative splicing 1 (MYBAS1), phytochrome-interacting factors 1 (PIF1), Oryza sativa teosinte branched 1/cycloidea/proliferating cell factor 5 (OsTCP5), slender 1 (SLN1), and mini zinc finger 1 (MIF1)), plant hormone biosynthesis or signaling genes (brassinazole-resistant 1 (BZR1), ent-kaurenoic acid oxidase-like (KAO), GRETCHEN HAGEN 3.2 (GH3.2), and small auxin up RNA 36 (SAUR36)), and starch and sucrose metabolism genes (α-amylases (AMY2A and AMY1.4)) was highly correlated with the mesocotyl elongation and deep-sowing tolerance response. These results enhance our understanding of how nutrient metabolism-related substances and genes regulate rice mesocotyl elongation. This may facilitate future studies on related genes and the development of novel rice varieties tolerant to deep sowing.




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