Modulation of Dehydration Tolerance in Soybean Seedlings (Dehydrin Mat1 Is Induced by Dehydration but Not by Abscisic Acid). Academic Article

abstract

• Germinated soybean (Glycine max L. cv Williams 82) seedlings subjected to rapid dehydration begin to lose the ability to recover when the relative water content of the plant decreases below 60%. The expanded cells of the hypocotyl appear more susceptible to dehydration-induced damage than do cells in the hypocotyl zone of cell growth. Pretreatment of seedlings prior to rapid dehydration with nonlethal water deficit or exogenous abscisic acid (ABA) shifts this viability threshold to progressively lower relative water contents, indicating the acquisition of increased dehydration tolerance. Increased tolerance is associated with osmotic adjustment in the hypocotyl zone of cell growth and with increases in soybean dehydrin Mat1 mRNA levels. The accumulation of Mat1 mRNA is dehydration dependent but insensitive to ABA. Induction of Mat1 mRNA accumulation by dehydration but not by ABA makes it an unusual member of the dehydrin family.

authors

• Mullet, John

published proceedings

• Plant Physiol

author list (cited authors)

• Whitsitt, M. S., Collins, R. G., & Mullet, J. E.

citation count

• 24

complete list of authors

• Whitsitt, MS||Collins, RG||Mullet, JE

publication date

• July 1997

publisher

• Oxford University Press (OUP)  Publisher

published in

• PLANT PHYSIOLOGY  Journal

keywords

• 0607 Plant Biology

PubMed Central ID

• 12223753

Digital Object Identifier (DOI)

• 10.1104/pp.114.3.917

start page

• 917

end page

• 925

volume

• 114

issue

• 3

URL

• http%3A%2F%2Fdx.doi.org%2F10.1104%2Fpp.114.3.917