NDLI: Physiological and morphological response to drought stress in seedlings of ten citrus

Content Provider	Springer Nature Link
Author	Zaher Ara, Tahereh Boroomand, Naser Sadat Hosseini, Mohammad
Copyright Year	2016
Abstract	Under drought stress, growth seedlings decreased, but proline and soluble sugar increased in shoots and roots of tolerance citrus. There are correlations between these parameters under water stress. Citrus fruit production is confronted worldwide with increasing biotic and abiotic constraints. In this study, ten citrus fruits (Bael, Sour orange, Sweet orange, Lemon, Rough lemon, Shell Mahalleh, Alemow, Trivestrange, Red blush and Pineapple) were compared for drought stress tolerance. Drought stress was induced by polyethylene glycol 6000 to produce water potentials of 0, −0.25, −0.5, −0.75, −1 and −1.5 MPa. Under stress conditions, shoot and root length, shoot and root dry weight, shoot and root fresh weight, tissue water content and germination percentage decreased markedly. There were variations in degree among the cultivars. Plants exposed to drought stress had a higher amount of soluble sugar in shoots and roots of tolerant cultivars (Bael, Rough lemon, Sour orange and Alemow) and a lower amount of starch in their tissues. Also, the levels of proline increased in parallel with the severity of drought stress in both shoots and roots in tolerant cultivars. The accumulation of soluble sugar and proline indicates a possible role of these osmolytes in drought tolerance. We assume that there would be correlations between these parameters under different levels of water stress. It is possible to use proline and soluble sugar as an index of drought stress in citrus trees. Cluster analysis produced a dendrogram with three groups differing in their tolerance to osmotic stress.
Starting Page	985
Ending Page	993
Page Count	9
File Format	PDF
ISSN	09311890
Journal	Trees
Volume Number	30
Issue Number	3
e-ISSN	14322285
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-03-18
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Proline Soluble sugars Water deficit Polyethylene glycol Genetic resource Forestry Plant Sciences Agriculture Plant Anatomy/Development Plant Pathology Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Ecology Physiology Plant Science Forestry

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