Salinity Stress Indices of Seed Yield and Nutrient Compositions in Rapeseed (Brassica napus L.)

Farid Abbaszadeh,Ali Cherati,Valiollah Rameeh

doi:10.5539/ijb.v4n1p154

Abstract

Soil salinity is a serious constrain to crop production in many areas of the world. Seven rapeseed genotypes were evaluated at two salinity levels of irrigation water including 0 and 12 ds/m in green house condition based on completely randomized design with three replications. The results showed that the most of the genotypes with the high seed yield in the non saline condition had high amount of seed yield in saline condition. Amount of sodium (Na) and calcium (Ca) were more correlated than potassium (K) with seed yield. Stress tolerance index related to potassium (STI) was significant positive correlated to Yp and Ys which indicating the importance of this stress index for improving seed yield in saline condition.L18 with high efficiency of Ca absorption in saline condition had the highest amount of seed yield in stress condition. STI was more efficient selection than SSI for improving seed yield and the other ions composition. On the basis of factor analysis the shoot ions compositions including Ca and Na are more suitable than K for discriminate the saline tolerant genotypes.

Highlights

Plants growing under field conditions are exposed to various environmental factors, which comprise their macro and microenvironment
Stress tolerance index related to potassium (STI) was significant positive correlated to Yp and yield between the stress (Ys) which indicating the importance of this stress index for improving seed yield in saline condition.L18 with high efficiency of Ca absorption in saline condition had the highest amount of seed yield in stress condition
The high amounts of Na were detected in Hyola401, L111 and Sarigol in saline condition and the high amounts of Ca-STI were related to L111 and Sarigol

Summary

Introduction

Plants growing under field conditions are exposed to various environmental factors, which comprise their macro and microenvironment. Efforts to improve crop performance under salinity have been elusive owing to its multigenic and quantitative nature. This has given an impetus to follow a combinatorial approach employing both conventional and non-conventional strategies to improve salt tolerance (Purty, et al, 2008). Adverse effect of salinity on plant growth may be due to ion cytotoxicity and osmotic stress. The most common adverse effect of salinity on the crop of Brassica is the reduction in plant height, size and yield as well as deterioration of the product quality (Zamani et al, 2011).

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