0000014285 00000 n D�T���Z�W,x�T��DXa4�� �� "+�^�Z~�^��][]a6�2@��齶�����k�T�iֱt�§��������p���2����pTG�����. 0000006222 00000 n Tolerance mechanisms mainly are applicable to practical manipulations. In this review, we consider the integrated salt metabolism of plants, essentially as a problem in meganutrient physiology. Despite extensive studies on salt tolerance of rice, a few studies have specifically investigated the mechanism by which rice plants respond and tolerate to moderate salt stress. van Zelm E(1), Zhang Y(1), Testerink C(1). %PDF-1.3 x�b```f``�f`e`Px� Ȁ �,@Q�3����!�ɂ@�����@����yHK �$XD�]�A������0�5p8lW`�� �)�r�����aއylL 2. 0000006083 00000 n 0000015600 00000 n 0000001326 00000 n At present, many scholars have studied salt damage to plant and plant salt-tolerance mechanism. 0000002244 00000 n stream Physiological and Biochemical Mechanisms of Salt Tolerance Plants develop various physiological and biochemical mech-anisms in order to survive in soils with high salt concen-tration. Two rice genotypes differing in their tolerance to saline-alkaline stress, Dongdao-4 and Jigeng-88, were used to explore physiological In this review, we examine the key mechanisms that mediate plant salt tolerance and give an overview of recent literature on salinity stress sensing and signaling as well as regulation of gene expression as part of the salt stress response in plants. Na + is generally not essential for plants. Despite its economic relevance, little is known about salt tolerance mechanisms in pepper plants. 0 We place cellular responses in a time- and tissue-dependent context in order to link them to observed phases in growth rate that occur in response to stress. Salt stress is a serious environmental factor limiting crop productivity and affects about 20% of irrigated agricultural land (Flowers and Yeo, 1995). Crop loss due to soil salinization is an increasing threat to agriculture worldwide. Tolerance mechanisms mainly are applicable to practical manipulations. Research advances elucidating th… tolerance to salt stress. 230 Salt stress manifestation on plants, mechanism of salt tolerance and potassium role in alleviating it: a review plants has received considerable attention. 0000001913 00000 n The Na+ accumulation in Thellungiella is lower, revealing a possible trait of salt tolerance mechanism in this plant species. In addition, it is well estab-lished that freeze-induced membrane damage results primarily from the severe dehydration associated with freezing (105,108). 0000007684 00000 n Author information: (1)Laboratory of Plant Physiology, Wageningen University, 6700 AA Wageningen, The Netherlands; email: christa.testerink@wur.nl. To tolerate salt in soil solution, plants deploy a variety of traits to control cell function and development that relies on signal perception, signal integration, and processing. ������A�P�E Understanding these mechanisms of stress tolerance, along with a plethora of genes involved in the stress signaling network, is important to improve high salinity stress tolerance in crops plants. Plant growth responds to salinity in two phases: a rapid, osmotic phase that inhibits growth of young leaves, and a slower, ionic phase that accelerates senescence of mature leaves. ~A���}.�;]m4����J�m�I4�������S�W��յ�����  �(A�WM��h+Av�k���{�J���V���+m%n���_k� ��\ ���;Q���t�fb`���e`�" u�0@� �*� We also review key Na trailer nat. 0000004574 00000 n But currently, there are no economically viable technological means to facilitate crop production under saline conditions (Ashraf, Foolad, 2007). at the Faculty of Biology University of Bielefeld Bielefeld, Germany Presented by Calliste Jérémie Diédhiou From Senegal Bielefeld, January 2006 . Primarily from the severe dehydration associated with freezing ( 105,108 ) rice plants: Reactive oxygen species ROS. Stress depends on the balance between the production and the link to calcium Ca21! Poses a serious threat to agriculture worldwide important roles in regulating the plant salt-tolerance network an overview of cellular physiological! 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