Genomics for drought resistance - getting down to earth

被引:60
作者
Blum, Abraham [1 ]
机构
[1] Plantstress, Tel Aviv, Israel
关键词
genetic modification; mutants; transgenic plants; water stress; ABIOTIC STRESS TOLERANCE; WATER-USE EFFICIENCY; RESPONSIVE GENE-EXPRESSION; GRAIN-YIELD; PHYSIOLOGICAL TRAITS; INCREASES TOLERANCE; REPRODUCTIVE STAGE; FIELD CONDITIONS; LEAF GROWTH; RICE YIELD;
D O I
10.1071/FP14018
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
A meta-analysis of 520 reports published during the last 20 years on transgenic and mutant plants generated towards drought resistance revealed a total of at least 487 tested transgenic plants involving at least 100 genes claimed to be functional towards drought resistance. During this period, the rate of reported new experimental transgenic model or crop plants for drought resistance has been increasing exponentially. Despite these numbers, qualified sources of information indicate a very limited impact on global dryland agriculture, whereas the genetically modified (GM) market hardly recognises drought-resistant GM cultivars. This paper discusses possible reasons for the limited impact of genomics on the delivery of drought-resistant cultivars, which are beyond issues of regulation, propriety or commercialisation. These reasons are mainly tied to scientific and methodological problems in drought stress gene expression work and the functional genomics protocols used to identify drought resistance. Insufficient phenotyping of experimental transgenic plants for drought resistance often does not allow true conclusions about the real function of the discovered genes towards drought resistance. The discussion is concluded by proposing an outline of a minimal set of tests that might help us resolve the real function of discovered genes, thus bringing the research results down to earth.
引用
收藏
页码:1191 / 1198
页数:8
相关论文
共 72 条
[1]   Transcriptional regulation of aquaporins in accessions of Arabidopsis in response to drought stress [J].
Alexandersson, Erik ;
Danielson, Jonas A. H. ;
Rade, Johan ;
Moparthi, Vamsi K. ;
Fontes, Magnus ;
Kjellbom, Per ;
Johanson, Urban .
PLANT JOURNAL, 2010, 61 (04) :650-660
[2]   Transformation of tobacco with an Arabidopsis thaliana gene involved in trehalose biosynthesis increases tolerance to several abiotic stresses [J].
Almeida, AM ;
Villalobos, E ;
Araújo, SS ;
Leyman, B ;
Van Dijck, P ;
Alfaro-Cardoso, L ;
Fevereiro, PS ;
Torné, JM ;
Santos, DM .
EUPHYTICA, 2005, 146 (1-2) :165-176
[3]  
[Anonymous], PUBLICATION N DAKOTA
[4]  
[Anonymous], 2012, PHYSIOLOGICAL BREEDI
[5]  
[Anonymous], 2013, NATURE, V497, P22, DOI [10.1038/497022a, DOI 10.1038/497022A]
[6]   Identification of Genes Involved in the Response of Arabidopsis to Simultaneous Biotic and Abiotic Stresses [J].
Atkinson, Nicky J. ;
Lilley, Catherine J. ;
Urwin, Peter E. .
PLANT PHYSIOLOGY, 2013, 162 (04) :2028-2041
[7]  
Barker T, 2005, PL BRED RE, V25, P173
[8]   Drought resistance, water-use efficiency, and yield potential - are they compatible, dissonant, or mutually exclusive? [J].
Blum, A .
AUSTRALIAN JOURNAL OF AGRICULTURAL RESEARCH, 2005, 56 (11) :1159-1168
[9]  
Blum A, 2011, PLANT BREEDING FOR WATER-LIMITED ENVIRONMENTS, P1, DOI 10.1007/978-1-4419-7491-4
[10]   Effective use of water (EUW) and not water-use efficiency (WUE) is the target of crop yield improvement under drought stress [J].
Blum, A. .
FIELD CROPS RESEARCH, 2009, 112 (2-3) :119-123