ORCID Profile
0000-0003-4064-7610
Current Organisation
University of Tasmania
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Publisher: Elsevier BV
Date: 11-2021
Publisher: Wiley
Date: 04-05-2018
DOI: 10.1111/NPH.15192
Abstract: The control of seed germination in response to environmental conditions is important for plant success. We investigated the role of the karrikin receptor KARRIKIN INSENSITIVE2 (KAI2) in the response of Arabidopsis seeds to osmotic stress, salinity and high temperature. Germination of the kai2 mutant was examined in response to NaCl, mannitol and elevated temperature. The effect of karrikin on germination of wild-type seeds, hypocotyl elongation and the expression of karrikin-responsive genes was also examined in response to such stresses. The kai2 seeds germinated less readily than wild-type seeds and germination was more sensitive to inhibition by abiotic stress. Karrikin-induced KAI2 signalling stimulated germination of wild-type seeds under favourable conditions, but, surprisingly, inhibited germination in the presence of osmolytes or at elevated temperature. By contrast, GA stimulated germination of wild-type seeds and mutants under all conditions. Karrikin induced expression of DLK2 and KUF1 genes and inhibited hypocotyl elongation independently of osmotic stress. Under mild osmotic stress, karrikin enhanced expression of DREB2A, WRKY33 and ERF5 genes, but not ABA signalling genes. Thus, the karrikin-KAI2 signalling system can protect against abiotic stress, first by providing stress tolerance, and second by inhibiting germination under conditions unfavourable to seedling establishment.
Publisher: Oxford University Press (OUP)
Date: 24-04-2020
DOI: 10.1104/PP.20.00400
Publisher: Oxford University Press (OUP)
Date: 11-03-2016
DOI: 10.1104/PP.16.00197
Publisher: Wiley
Date: 24-09-2020
DOI: 10.1111/NPH.16898
Location: China
No related grants have been discovered for Lu Wang.