Abiotic stress tolerance in plants by LIMING XIONG, MANABU ISHITANI (auth.), ASHWANI K. RAI,

By LIMING XIONG, MANABU ISHITANI (auth.), ASHWANI K. RAI, TERUHIRO TAKABE (eds.)

Stresses in crops because of salt, drought, temperature, oxygen, and poisonous compounds are the critical explanation for aid in crop yield. for instance, excessive salinity in soils debts for big decline within the yield of a wide selection of plants global over; ~1000 million ha of land is tormented by soil salinity. elevated solar results in the new release of reactive oxygen species, which harm the plant cells. the specter of worldwide atmosphere switch makes it more and more hard to generate crop vegetation that may stand up to such harsh stipulations. a lot development has been made within the identity and characterization of the mechanisms that permit vegetation to tolerate abiotic stresses. the knowledge of metabolic fluxes and the most constraints liable for the creation of appropriate solutes and the id of many transporters, jointly open the potential of genetic engineering in crop vegetation with the concomitant enhanced pressure tolerance. Abiotic pressure Tolerance in vegetation is a brand new e-book with specialize in how crops adapt to abiotic pressure and the way genetic engineering may well enhance the worldwide atmosphere and foodstuff provide. specially, the appliance of biotechnology in Asia and Africa will be very important. Environmental pressure impression is not just on present crop species, yet is additionally the paramount barrier to the creation of crop crops into parts no longer at present getting used for agriculture. Stresses are inclined to improve the severity of difficulties to be confronted by means of vegetation within the close to future.

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E. R. (2002) Calmodulin as a potential negative regulator of Arabidopsis COR gene expression. Plant Physiol. 128, 1169-1172. 74. , Ranjeva, R. and Ranty, B. (2004) A novel calmodulin-binding protein functions as a negative regulator of osmotic stress tolerance in Arabidopsis thaliana seedlings. Plant J. 38, 410-420. 75. Sheen, J. (1996) Ca2+-dependent protein kinases and stress signal transduction in plants. Science 274, 1900-1902. 76. , Shimamoto, K. and Izui, K. (2000) Over-expression of a single Ca2+-dependent protein kinase confers both cold and salt/drought tolerance on rice plants.

63. E. M. (2003) A cell surface receptor mediates extracellular Ca2+ sensing in guard cells. Nature 425, 196-200. 64. D. (1999) Expression of Arabidopsis CAX1 in tobacco: altered calcium homeostasis and increased stress sensitivity. Plant Cell 11, 2113-2122. 65. M. and Salinas. J. (2003) Mutations in the Ca2+/H+ transporter CAX1 increase CBF/DREB1 expression and the coldacclimation response in Arabidopsis. Plant Cell 15, 2940-2951. 66. ,. Breton, G. and Harmon, A. (2004) Decoding Ca2+ signals through plant protein kinases.

Barley also has PMP3-like genes and its expression is strongly induced by salt and osmotic stress treatments [40, 41]. It was reported that PMP3 deletion confers sensitivity to cytotoxic cations, including NaCl and hygromycin B. To examine the function of AcPMP3 genes, complementation test was carried out with yeast mutant (∆pmp3, ∆nha1, ∆pmr2) lacking Na+/H+ antiporter and Na+-ATPase that shows more sensitive to salt stress than ∆pmp3 single mutant. It was proposed that loss of PMP3 protein causes membrane hyperporalization, and activates Na+ influx system [42].

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