Transcriptional response of abscisic acid (ABA) metabolism and transport to cold and heat stress applied at the reproductive stage of development in Arabidopsis thaliana

ABA Regulation of the Cold Stress Response in Plants

“…Consistent with this, foliar application of ABA to a wide range of plant species does not induce cold hardness or freezing tolerance (Gusta et al 2005). A recent study showed that cold stress specifically activate the expression of ABA biosynthesis genes in reproductive organs, such as the inflorescence meristem, with only slightly increased expression in the leaves and vegetable organs (Baron et al 2012). This finding supports the notion of ABA function in stimulating and hastening plant harvests under adverse environmental conditions.…”

Depletion of abscisic acid levels in roots of flooded Carrizo citrange (Poncirus trifoliata L. Raf. × Citrus sinensis L. Osb.) plants is a stress-specific response associated to the differential expression of PYR/PYL/RCAR receptors

“…Indeed, there are 14 loci encoding for ABA receptors in Arabidopsis, each of them having different intrinsic affinities for the hormone and could also bind to specific PP2Cs (Dupeux et al 2011;Santiago et al 2012;Antoni et al 2013;Fuchs et al 2014). Besides the fine-tuning of the ABA signal, modulation of the endogenous hormone levels is associated to the specific environmental situation and the stress pressure, which adds further complexity to the model (Seiler et al 2011;Romero et al 2012b; Baron et al 2012;De Ollas et al 2013). …”

Heat stress tolerance responses in developing tomato anthers

“…The high temperature extremes assessed in the current study might also dramatically alter pathways responsible for RNAi-mediated gene silencing (RdDM pathway) and genesis of small RNAs. Abiotic stress treatments and even the metabolic status of rapidly growing or inactive tissues also influence mRNA turnover and translation in plants (Baron et al, 2012). Currently, the role for ABA in reproductive development and abiotic stress tolerance of reproductive structures is ambiguous.…”

“…A number of studies provide evidence that the beneficial or detrimental role(s) assigned to ABA accumulation during reproductive development are heavily dependent upon plant phenology and physiological context. However, recent studies propose excessive ABA accumulation negatively impacts the abiotic stress tolerance of reproductive tissues (Baron et al, 2012b;.…”

“…A molecular analysis in several crop plants revealed distinctive cellular and organ-level aspects of ABA homeostasis that distinguish stress-tolerant and stress-sensitive germplasm at the reproductive stage of development (Baron et al, 2012a). Comparison of ABA biosynthesis in coldsensitive and cold-tolerant rice lines indicated that cold-tolerant rice accumulated less ABA in response to cold treatment.…”