Salt sensitivity of the vegetative and reproductive stages in chickpea (Cicer arietinum L.): Podding is a particularly sensitive stage uri icon

abstract

  • Soil salinity is an increasing problem, including in regions of the world where chickpea is cultivated. Saltsensitivity of chickpea was evaluated at both the vegetative and reproductive phase. Root-zone salinitytreatments of 0, 20, 40 and 60mM NaCl in aerated nutrient solution were applied to seedlings or toolder plants at the time of flower bud initiation. Even the reputedly tolerant cultivar JG11 was sensitiveto salinity. Plants exposed to 60mM NaCl since seedlings, died by 52 d without producing any pods; at40mM NaCl plants died by 75 d with few pods formed; and at 20mM NaCl plants had 78?82% dry massof controls, with slightly higher flower numbers but 33% less pods. Shoot Cl exceeded shoot Na by 2?5times in both the vegetative and reproductive phase, and these ions also entered the flowers. Conversionof flowers into pods was sensitive to NaCl. Pollen from salinized plants was viable, but addition of 40mMNaCl to an in vitro medium severely reduced pollen germination and tube growth. Plants recoveredwhen NaCl was removed at flower bud initiation, adding new vegetative growth and forming flowers,pods and seeds. Our results demonstrate that chickpea is sensitive to salinity at both the vegetativeand reproductive phase, with pod formation being particularly sensitive. Thus, future evaluations of salttolerance in chickpea need to be conducted at both the vegetative and reproductive stages

publication date

  • 2011
  • 2011