@Article{phyton.2026.075984,
AUTHOR = {Tingting Yuan, Mutong Li, Zhishun Yu, Jiangyun Huang, Qingqin Zhang, Suqin Zhang, Guangdong Geng},
TITLE = {A <i>Tritipyrum</i>-Derived <i>HVA22</i> Homolog Enhances Wheat Salt Tolerance},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {95},
YEAR = {2026},
NUMBER = {3},
PAGES = {--},
URL = {http://www.techscience.com/phyton/v95n3/66764},
ISSN = {1851-5657},
ABSTRACT = {<i>HVA22</i> is a gene induced by abscisic acid (ABA) and abiotic stress. Previous transcriptome data of salt-tolerant <i>Tritipyrum</i> “Y1805” revealed that <i>HVA22</i> was significantly upregulated under salt stress. Gene <i>TtHVA22</i> was successfully amplified from “Y1805”, with an open reading frame of 468 bp and encoding a protein of 156 amino acids. Gene <i>TtHVA22</i> was transformed into bread wheat “1718” via coleoptile method. The relative expression level of <i>TtHVA22</i> in roots was remarkably higher than in stems and leaves under salt stress. During the seedling stage, the <i>TtHVA22</i> overexpression (OE) line exhibited less leaf wilting under salt stress than wild-type (WT) plants. Under salt stress and recovery conditions, <i>TtHVA22</i> OE significantly increased root length, plant height, fresh weight, and dry weight compared to WT plants. Additionally, the levels of ABA, soluble sugars, soluble proteins, proline, pyruvate, and photosynthetic pigments and peroxidase activity were significantly higher in the OE lines than in the WT plants; however, their malondialdehyde content and relative conductivity were opposite. Two years of field data demonstrated that stem diameter and grain yield per plant were significantly greater in the OE lines than the WT plants. Therefore, wheat salt tolerance was improved in the <i>TtHVA22</i> OE lines by osmotic regulation, antioxidation, and chlorophyll stabilization.},
DOI = {10.32604/phyton.2026.075984}
}