By Eva Zažímalová, Jan Petrášek, Eva Benková
Auxin is a crucial signaling compound in crops and very important for plant improvement and development. the current publication, Auxin and its function in Plant improvement, presents the reader with specific and finished perception into the functioning of the molecule more commonly and in particular in plant improvement. within the first half, the functioning, metabolism and signaling pathways of auxin in vegetation are defined, the second one half depicts the categorical position of auxin in plant improvement and the 3rd half describes the interplay and functioning of the signaling compound upon stimuli of our surroundings. each one bankruptcy is written via foreign specialists within the respective box and designed for scientists and researchers in plant biology, plant improvement and phone biology to summarize the new growth in knowing the function of auxin and recommend destiny views for auxin research.
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Extra info for Auxin and Its Role in Plant Development
YUC was later found to be a member of a gene family with 11 genes in the Arabidopsis genome. The founding member was renamed as YUC1. Overexpression of any of the YUC family members leads to auxin overproduction phenotypes in Arabidopsis, suggesting that all of the YUC genes participate in auxin biosynthesis (Cheng et al. 2006, 2007). The YUC genes have overlapping functions and inactivation of a single YUC gene does not cause any obvious developmental defects (Cheng et al. 2006, 2007). The observed genetic redundancy among YUC genes may provide an explanation for why YUC genes had not been discovered previously by forward loss-of-function genetic screens.
Science 268:1745–1748 Bentley JA, Farrar KR, Housley S, Smith GF, Taylor WC (1956) Some chemical and physiological properties of 3-indolylpyruvic acid. Biochem J 64:44–49 Bialek K, Michalczuk L, Cohen JD (1992) Auxin biosynthesis during seed germination in Phaseolus vulgaris. Plant Physiol 100:509–517 Boerjan W, Cervera MT, Delarue M, Beeckman T, Dewitte W, Bellini C, Caboche M, Van Onckelen H, Van Montagu M, Inze D (1995) Superroot, a recessive mutation in Arabidopsis, confers auxin overproduction.
IAA can also be taken out of action by forming various conjugates with alcohols, sugars, and amino acids (Woodward and Bartel 2005). 1 Synthesis of IAA Conjugates Great progresses have been made in recent years towards understanding the enzymes responsible for synthesizing IAA esters and amide conjugates. In maize, synthesis of IAA-ester with sugar starts with the formation of IAA-glucose that is preceded by activation of glucose by the formation of glucose-UDP that is then joined with IAA. IAA-glucose is further converted to other IAA-sugar ester conjugates that are mostly believed to be a storage form of IAA (Michalczuk and Bandurski 1982; Leznicki and Bandurski 1988a, b).