000			03747nab a22004457a 4500
001			G81411
003			MX-TxCIM
005			20240919021146.0
008			210908s2005 xxk|||p|op||| 00| 0 eng d
022			_a1744-7348 (Online)
022	0		_a0003-4746
024	8		_ahttps://doi.org/10.1111/j.1744-7348.2005.040058.x
040			_aMX-TxCIM
041			_aeng
072		0	_aF08
072		0	_aF30
090			_aCIS-4390
100	1		_aReynolds, M.P. _gGlobal Wheat Program _8INT1511 _9831
245	1	0	_aProspects for utilising plant-adaptive mechanisms to improve wheat and other crops in drought- and salinity-prone environments
260			_aUnited Kingdom : _bWiley, _c2005.
340			_aComputer File|Printed
500			_aPeer review
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0003-4746
520			_aBreeding for adaptation to abiotic stress is extremely challenging due to the complexity of the target environments as well as that of the stress-adaptive mechanisms adopted by plants. While many traits have been reported in the literature, these must be considered with respect to the type of environment for which a cultivar is targeted. In theory, stress-adaptive traits can be divided into groups whose genes and/or physiological effects are likely to be relatively independent such that when parents with contrasting traits are crossed, adaptive genes will be pyramided. Currently the following groups of candidate traits are being considered for drought adaptation in wheat: traits relating to: (i) pre-anthesis growth, (ii) water extraction, (iii) water use efficiency, (iv) photo-protection. A number of mechanisms relating to root function have potential to ameliorate drought stress. Hydraulic redistribution (HR) of water by roots of dryland shrubs enables even relatively small amounts of rainwater to be moved down into the soil profile actively by the root system before it evaporates from the soil surface. Another example is the symbiotic relationship of plants with mycorrhizal fungi that produce a glycoprotein that has a positive effect on soil structure and moisture characteristics. From an agronomic point of view, crop water use efficiency can be increased by exploiting the stress-adaptive mechanism whereby leaves reduce transpiration rate in response to a chemical root signal in response to drying soil. While there is limited genetic diversity for adaptation to salinity in wheat, tolerance has been found in the ancestral genomes of polyploid wheat and their relatives associated with sodium exclusion into the xylem. Wide crossing techniques such as production of synthetic hexaploids are being exploited to tap into this source of genetic diversity. Looking further into the future, progress is being made into understanding the regulatory mechanisms that are expressed under abiotic stress to maintain cellular homeostasis, as well as in the ability to genetically transform crop plants with genes from alien species.
536			_aGlobal Wheat Program
546			_aText in English
591			_a0504|AL-Wheat Program
594			_aINT1511
650		7	_91080 _aDrought _2AGROVOC
650		7	_98901 _aSalinity _2AGROVOC
650		7	_aPlant breeding _gAGROVOC _2 _91203
650		7	_98089 _aFurrow irrigation _2AGROVOC
650		7	_92020 _aHexaploidy _2AGROVOC
650		7	_91310 _aWheat _2AGROVOC
700	1		_aMujeeb-Kazi, A. _9221
700	1		_aSawkins, M. C. _96567
773	0		_tAnnals of Applied Biology _n632868 _gv. 146, no. 2, p. 239-259 _dUnited Kingdom : Wiley, 2005. _wG444142 _x1744-7348
856	4		_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/1238
942			_cJA _2ddc _n0
999			_c25337 _d25337