In:
Frontiers in Plant Science, Frontiers Media SA, Vol. 13 ( 2023-1-5)
Abstract:
Auxin is essential for regulating plant growth and development as well as the response of plants to abiotic stresses. AUX/LAX proteins are auxin influx transporters belonging to the amino acid permease family of proton-driven transporters, and are involved in the transport of indole-3-acetic acid (IAA). However, how AUX/LAX genes respond to abiotic stresses in Chinese hickory is less studied. For the first time identification, structural characteristics as well as gene expression analysis of the AUX/LAX gene family in Chinese hickory were conducted by using techniques of gene cloning and real-time fluorescent quantitative PCR. Eight CcAUX/LAXs were identified in Chinese hickory, all of which had the conserved structural characteristics of AUX/LAXs . CcAUX/LAXs were most closely related to their homologous proteins in Populus trichocarpa , which was in consistence with their common taxonomic character of woody trees. CcAUX/LAXs exhibited different expression profiles in different tissues, indicating their varying roles during growth and development. A number of light-, hormone-, and abiotic stress responsive cis -acting regulatory elements were detected on the promoters of CcAUX/LAX genes. CcAUX/LAX genes responded differently to drought and salt stress treatments to varying degrees. Furthermore, CcAUX/LAX genes exhibited complex expression changes during Chinese hickory grafting. These findings not only provide a valuable resource for further functional validation of CcAUX/LAXs , but also contribute to a better understanding of their potential regulatory functions during grafting and abiotic stress treatments in Chinese hickory.
Type of Medium:
Online Resource
ISSN:
1664-462X
DOI:
10.3389/fpls.2022.1060965
DOI:
10.3389/fpls.2022.1060965.s001
DOI:
10.3389/fpls.2022.1060965.s002
DOI:
10.3389/fpls.2022.1060965.s003
DOI:
10.3389/fpls.2022.1060965.s004
DOI:
10.3389/fpls.2022.1060965.s005
DOI:
10.3389/fpls.2022.1060965.s006
DOI:
10.3389/fpls.2022.1060965.s007
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2023
detail.hit.zdb_id:
2687947-5
detail.hit.zdb_id:
2613694-6
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