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The involvement of Rho of Plants (ROP) GTPases in abscisic acid (ABA) signalling in Arabidopsis has been demonstrated in many studies. However, the roles of RopGEFs (Rop guanine nucleotide exchange factors), which modulate ROP activities in ABA signalling, are poorly understood. Here, we demonstrate that RopGEF2 may play a negative role in ABA‐suppressed seed germination and post‐germination growth...
Abscisic acid (ABA) and cytokinin are key hormones controlling plant development. How ABA and cytokinin interplay to control the transition from a dry seed into a young seedling remains elusive. Here we undertook a gain‐of‐function genetic screen to identify ABA‐insensitive mutants during seed germination in Arabidopsis using an estradiol‐inducible approach. In the presence of estradiol, one of these...
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