Increasing salt tolerance in the tomato

被引:294
作者
Cuartero, J [1 ]
Bolarín, MC
Asíns, MJ
Moreno, V
机构
[1] CSIC, Estac Expt La Mayora, E-29750 Malaga, Spain
[2] CSIC, CEBAS, E-30100 Murcia, Spain
[3] Inst Valenciano Invest Agr, E-46113 Moncada, Spain
[4] Univ Politecn Valencia, CSIC, Inst Biol Mol & Celular Plantas, E-46022 Valencia, Spain
关键词
conditioning; grafting; misting; pretreatments of salt and drought; quantitative trait loci; transgenic plants;
D O I
10.1093/jxb/erj102
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
In this paper, a number of strategies to overcome the deleterious effects of salinity on plants will be reviewed; these strategies include using molecular markers and genetic transformation as tools to develop salinity-tolerant genotypes, and some cultural techniques. For more than 12 years, QTL analysis has been attempted in order to understand the genetics of salt tolerance and to deal with component traits in breeding programmes. Despite innovations like better marker systems and improved genetic mapping strategies, the success of marker-assisted selection has been very limited because, in part, of inadequate experimental design. Since salinity is variable in time and space, experimental design must allow the study of genotypexenvironment interaction. Genetic transformation could become a powerful tool in plant breeding, but the growing knowledge from plant physiology must be integrated with molecular breeding techniques. It has been shown that the expression of several transgenes promotes a higher level of salt tolerance in some species. Despite this promising result, the development of a salt-tolerant cultivar by way of transgenesis has still not been achieved. Future directions in order to overcome the present limitations are proposed. Three cultural techniques have proved useful in tomato to overcome, in part, the effects of salinity: treatment of seedlings with drought or NaCl ameliorates the adaptation of adult plants to salinity; mist applied to tomato plants grown in Mediterranean conditions improves vegetative growth and yield in saline conditions; and grafting tomato cultivars onto appropriate rootstocks could reduce the effects of salinity.
引用
收藏
页码:1045 / 1058
页数:14
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