Tomato (Lycopersicon esculentum) Transcript Induced by Water Deficit and Ripening

Abstract

Tomato (Lycopersicon esculentum) fruit ripening is a devel

ASR1 transcription factor and its role in metabolism

“…26,30,31 On the other hand, ASR1 acts as a transcription factor. This proposed dual function is supported by ASR1 localization both in the nucleus and in the cytosol, 4,17,32,33 as well as by its role as a DNA-binding protein. 17,[33][34][35] Moreover, ASR1 was recently found to interact physically with regulatory regions of genes related to cell wall synthesis and remodeling as well as with channels implicated in water and solute flux, such as aquaporins.…”

“…13,31 However, ASR1 is also expressed under many other physiological conditions, such as tomato and strawberry fruit ripening. 3,4,15 This indicates that ASR1 may have other functions beyond its role in stress. More than a decade ago,Çakir et al 17 proved that a grape ASR1 ortholog called MSA recognizes specific sites in the regulatory region of the hexose transporter 1 gene (Ht1 is described in Hayes et al 37 Vignault et al 38 and Fillion et al).…”

“…In a wide variety of species, including strawberry, 15 conditions in a wide range of species. Among others, this increase occurs in tobacco and tomato by osmotic and drought stress; 4,16,[20][21][22] in rice by drought, saline and osmotic stress; 10,23,24,25 and in plantain and banana by osmotic and biotic stress. 11,26,27 Only a few physiological studies with transgenic tomato, 28 tobacco, 22 maize, 29 and rice 18 plants have proved the involvement of ASR1 in stress tolerance.…”

“…2 Genes of the Asr (ABA, stress, ripening) family were initially characterized by their strong induction under stress conditions and during tomato fruit ripening. 3,4 Their members harbor the ABA/WDS (abscisic acid/water deficit stress) domain (Pfam entry PF02496) as a common denominator. This protein family is widely distributed in the Plantae kingdom, both in angiosperms and in gymnosperms, but not in all species.…”

The ZmASR1 Protein Influences Branched-Chain Amino Acid Biosynthesis and Maintains Kernel Yield in Maize under Water-Limited Conditions

“…Since their discovery more than a decade ago, they have been described as accumulating to high levels during plant developmental processes, such as fruit ripening, pollen maturation, and Glc metabolism (Iusem et al, 1993;Wang et al, 1998;Cakir et al, 2003;Frankel et al, 2007;Yang et al, 2008), and in response to diverse stresses, including water deficit, salt, cold, limited light, and, lately, pathogen attack (Schneider et al, 1997;Riccardi et al, 1998;Vaidyanathan et al, 1999;Huang et al, 2000;Maskin et al, 2001;Kalifa et al, 2004b;Liu et al, 2010;Philippe et al, 2010;Henry et al, 2011). Nevertheless, it is noteworthy that their exact function remains enigmatic.…”