Effet du stress hydrique sur les critères physiologiques et biochimiques chez neuf génotypes de pois chiche (Cicer arietinum L.)

• Published in: Revue Nature et Technologie (En ligne) 2014-06 (11), p.8
• Main Authors: Chafika, Houasli, Nsarellah, Nasserlhaq, Keltoum, Elbouhmadi, Said, Mahboub, Udupa, Sripada
• Format: Article
• Language: fre
• Subjects: Biochemistry; Crops; Drought; Physiology
• ISSN: 1112-9778; 2437-0312

Chickpea (Cicer arietinum L) is a widely cultivated crop species throughout the world. Drought is a major constraint to chickpea production. Losses attributed to drought are estimated at 1.2 billion dollars worldwide. Improved yields would be brought by the use of water stress tolerant varieties. The objective of this work is to study some physiological and biochemical responses in this crop species to drought stress and to assess the contribution of the genetic factor in improving chickpea tolerance to drought. Nine chickpea genotypes were subjected, in a three blocks trial, to two watering regimes. The experiment was conducted in a greenhouse with controlled environment. Several physiological and biochemical criteria were studied (membrane stability, relative water content, chlorophyll (a, b and total) , free proline, total soluble carbohydrates and total amino acids contents). The results showed that water stress induced changes in concentrations of several of the compounds studied. The genotype factor showed effects that were statistically significant for certain characteristics (RWC and Chlorophylls). The interaction between water regime and genotypes showed no significant effect. This study shows that all measured criteria were involved in the response of chickpea to water stress and that the genetic factor is involved in the case of chlorophyll. This study also shows that further study of the genetic factor could produce genotypes more efficient in terms of drought tolerance.