Genetic Diversity in Annual Xerohalophytes of the Family Chenopodiaceae along Soil Moisture and Salinity Gradients


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Genetic polymorphism has been studied in populations of two annual xerohalophyte species of the family Chenopodiaceae, Atriplex tatarica and Sedobassia sedoides, growing on soils with different levels of soil moisture and sodium and potassium ion contents. A tendency toward decrease in the percentage of polymorphic loci in A. tatarica at higher soil salinity and increase in the observed heterozygosity of S. sedoides populations at higher levels of soil potassium has been revealed, with parameters of genetic variation in either species showing no dependence on soil moisture. Soil potassium deficiency is a stress factor for S. sedoides at both physiological and population-genetic levels. Mechanisms controlling sodium absorption and maintaining ion homeostasis and also a high level of homozygosity in S. sedoides indicate the improvement of stress tolerance in this annual species.

作者简介

E. Shuyskaya

Timiryazev Institute of Plant Physiology

编辑信件的主要联系方式.
Email: evshuya@mail.ru
俄罗斯联邦, Moscow, 127276

Z. Rakhmankulova

Timiryazev Institute of Plant Physiology

Email: evshuya@mail.ru
俄罗斯联邦, Moscow, 127276

Ya. Suyundukov

Sibai Branch

Email: evshuya@mail.ru
俄罗斯联邦, Sibai, Bashkortostan, 453830

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