Morphological adaptation of &lt;i&gt;Cercis griffithii&lt;/i&gt; seedlings in response to progressive drought and salinity stresses

S.A.H Tabatabaei,M Esmaeili Sharif,H Jalilvand,H Ahani,M Bagheri

doi:10.4314/jasem.v21i7.6

Abstract

The experiment for evaluate the effect of drought and salinity stresses on the morphological behaviours of Afghan redbud seedlings was done in Torogh nursery in Iran country. This study was conducted in a completely randomized design; without stress (tap common water in the nursery- EC 0.8 dS m-1), drought stress (four days a time irrigation) and salt treatment (EC 12.03 dS m-1). During the summer, morphological traits were measured and calculated. Result showed that height seedling after 60th until 70th day significant at the (p<0.05) level and significantly at (p<0.01) levels at the end of growth period under the drought and salinity conditions. Leaf area at the end of growth, leaf area growth and leaf area reduced significantly at (p<0.01) in comparison with control treatment. The result indicated that effect of time × drought interaction for height, diameter, number of leaves and leaf area was not significant. The result indicated that effect of time × salinity interaction for height, diameter and number of leaves was not significant but for leaf area had significant difference at (p<0.05) level. We used four days a time by irrigation and saline water in nursery less than EC 12.03 dS m-1 for economy well water in arid and semi-arid region.Keywords: Afghan redbud, Stress, Growth, Regression model, Repeated Measures

Highlights

Drought and salinity, the major abiotic stresses, are the main factors determining global vegetation distribution in the forestry and agricultural sector
Mexican redbud maintained greater water use efficiency under increasing drought than C. canadensis var. canadensis. It had a high rate of net photosynthesis and did not immediately reduce stomatal conductance during drought stress
Analysis of variance indicated those terms of height seedling in 60th and 70th day significant at the 0.05 and 80th and 90th at the 0.01 level and 0.05 level in leaf area growth, leaf area ratio and leaf area under the drought and salinity conditions

Summary

Introduction

The major abiotic stresses, are the main factors determining global vegetation distribution in the forestry and agricultural sector. Water stress caused by high salinity and drought is one of the serious factors to limit plant productivity (Ueda et al, 2007). In several studies is proven to reduce the growth morphology of plants to drought and salinity stresses. Griffin (2002) studied the effect of heat and drought on photosynthesis and water relations of Cercis canadensis var. Mexican redbud maintained greater water use efficiency under increasing drought than C. canadensis var. It had a high rate of net photosynthesis and did not immediately reduce stomatal conductance during drought stress.

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Results

Conclusion