Coding and Decoding of Calcium Signals in Plants by Anthony J. Trewavas (auth.), Sheng Luan (eds.)

By Anthony J. Trewavas (auth.), Sheng Luan (eds.)

Plants can't movement clear of their environments. accordingly, all vegetation that experience survived so far have advanced refined signaling mechanisms that permit them to understand, reply, and adapt to consistently altering environmental stipulations. among the mobile procedures that reply to environmental alterations, elevation of calcium degrees is by way of a ways the main common messenger that fits basic signs to mobile responses. but it continues to be uncertain how calcium, an easy cation, interprets such a lot of diverse signs into designated responses - how is the “specificity” of signal-response coupling encoded in the calcium changes?

This booklet will try to solution this question by means of describing the mobile and molecular mechanisms underlying the coding and deciphering of calcium indications in plant cells.

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2010). Consistently, overexpression of NtRhoGAP1 induced short tubes with narrower tips (Klahre and Kost 2006). In addition to the GAP domain, RopGAP proteins also contain Cdc42/Rac-interactive binding (CRIB) motif which itself does not possess any GAP activity but its presence enhances GAP activity in RopGAP1 by promoting binding of RopGAP1 and ROP1 (Wu et al. 2000). Similar observation has been reported in tobacco NtRhoGAP1 whose GAP activity toward NtRac5 is enhanced in the presence of CRIB motif (Klahre and Kost 2006).

1975; Rathore et al. 1991). However, their mode of action is still poorly understood. A recent study suggesting Ca2+’s role in the negative feedback loop in regulating ROP1 activity provides some new insights into the Ca2+’s mode of action in pollen tubes (Yan et al. 2009). Interestingly, circumstantial evidence supports a functional interaction between Ca2+ and REN1 (Hwang et al. 2008). 5 mM), suggesting that REN1 and Ca2+ may work together in the REN1-based negative feedback loop (Hwang et al.

J Cell Biol 181:1155–1168 Lee YJ, Yang Z (2008) Tip growth: signaling in the apical dome. Curr Opin Plant Biol 11:662–671 Lee J-Y, Yoo B-C, Harmon AC (1998) Kinetic and calcium-binding properties of three calciumdependent protein kinase isoenzymes from soybean. Biochemistry 37:6801–6809 Li H, Wu G, Ware D, Davis KR, Yang Z (1998) Arabidopsis Rho-related GTPases: differential gene expression in pollen and polar localization in fission yeast. Plant Physiol 118:407–417 38 A. Jamin and Z. Yang Li H, Lin Y, Heath RM, Zhu MX, Yang Z (1999) Control of pollen tube tip growth by a Rop GTPase-dependent pathway that leads to tip-localized calcium influx.

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