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Author Zhang Y., Du H., Gui Y., Xu F., Liu J., Zhang J., Xu W.
Title Moderate water stress in rice induces rhizosheath formation associated with abscisic acid and auxin responses.
Abstract:
The rhizosheath is known to be beneficial for drought resistance in many plants, but the regulation of rhizosheath formation in rice plants is unclear. Here, we investigate rhizosheath formation in different rice varieties and root hair mutants. Our results showed that moderate water stress in rice induced rhizosheath formation. The soil porosity and water content were higher in the rice rhizosheath than in the rice bulk soil under moderate water stress. Additionally, rhizosheath formation in short root hair mutants was lower than in wild-type rice under moderate water stress. Moreover, transcriptomic results indicated that abscisic acid (ABA) and auxin were involved in root and root hair responses in rhizosheath formation. Further, blocking ABA and auxin pathways in wild type and in rhl1-1, the shortest root hair mutant, rhizosheath formation and root hair length were significantly decreased under moderate water stress. However, wild type plants maintained a higher root ABA content, root basipetal auxin transport, root hair length, and amount of rhizosheath than did rhl1-1. Our results suggest that moderate water stress in rice induces rhizosheath formation by modulating the ABA and auxin responses to regulate root and root hair growth, which may be used to breed rice varieties resistant to drought.
Journal J. Exp. Bot.
Country China
Volume 71(9)
Pages 2740-2751
Year 2020
PubMed ID 32053723
PubMed Central ID 7210750
DOI 10.1093/jxb/eraa021
URL -
Relation
Gene ABA8OX2 ARF10 ARF13 ARF24 DHN6 EM EXPA17 GH3-4 IAA22 IAA25 IAA8 JAR3 LRA1 PIN5B PIN5C PYL/RCAR13 PYL/RCAR4 PYL/RCAR6 RAB16A RAB16B RAB16C RAB16D RHD3 RHL1 SAPK1 SAPK9 SAUR27 SAUR39 SAUR9 _ _ _
INSD -
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
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Stages in Each Organ
- Muant Lines (Gene)
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Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase