NDLI: Effect of abscisic acid on heat stress tolerance in the calli from two ecotypes of Phragmites communis

Content Provider	Springer Nature Link
Author	Ding, W. Song, L. Wang, X. Bi, Y.
Copyright Year	2010
Abstract	Dune reed (DR) and swamp reed (SR) are two ecotypes of reed (Phragmites communis Trin.) that displayed differences in stress tolerance. To uncover the molecular basis for such difference, the effects of heat stress were studied using the calli derived from the two ecotypes. Heat stress caused increased ion leakage, inhibited growth, decreased cell viability, and elevated hydrogen peroxide (H2O2) and malondialdehyde (MDA) contents in the calli of both ecotypes, but DR callus showed better heat tolerance than SR callus. In DR callus, heat stress caused significant increase in the endogenous ABA content but not in SR callus. Application of fluridone (an ABA synthesis inhibitor) aggravated the heat stress damages on the DR callus whereas it had only minimal impact on the SR callus. Exogenous application of ABA alleviated the heat stress symptoms in the calli of both ecotypes. ABA treatment increased the activities of superoxide dismutase, catalase, ascorbate peroxidase and peroxidase, and also decreased H2O2 and MDA contents. These results indicate that the ability of ABA synthesis under heat stress is a key factor attributing to the higher heat tolerance of DR than SR.
Starting Page	607
Ending Page	613
Page Count	7
File Format	PDF
ISSN	00063134
Journal	Biologia Plantarum
Volume Number	54
Issue Number	4
e-ISSN	15738264
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-09-23
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Plant Science Horticulture

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