Influence of abscisic acid on lipid-transfer protein accumulation and suberin deposition in pea roots under salinity

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It is known that plant responses to stress are coordinated by a variety of regulatory networks, including the induction of endogenous abscisic acid (ABA). The mechanism of the protective action of ABA was investigated, suggesting a conjugated interaction with lipid-transporting proteins (LTP) and their participation in the formation of lamellae of suberin in pea roots during salination. The immunohistochemical method showed that the NaCl-induced accumulation of LTP and ABA in the cell walls of the phloem was accompanied by the deposition of suberin in the endodermal region of the roots of pea seedlings. Unlike LTP, which were localized around phloem cells, ABA was present inside these cells. In addition, treatment of control plants with exogenous ABA led to the accumulation of LTP in phloem cells and contributed to root corking. Analysis of phloem exudate for the presence of LTP revealed an increase in their content under salinization conditions. These results indicate the importance of NaCl-induced accumulation of ABA in the regulation of LTP levels and enhanced formation of apoplastic barriers in the roots of pea plants.

作者简介

G. Akhiyarova

Ufa Institute of Biology of Ufa Federal Research Center of the RAS

Email: akhiyarova@rambler.ru
ul. Karla Marxa 16/2, Ufa 450054, Russia

G. Vafina

Ufa Institute of Biology of Ufa Federal Research Center of the RAS

ul. Karla Marxa 16/2, Ufa 450054, Russia

T. Arkhipova

Ufa Institute of Biology of Ufa Federal Research Center of the RAS

ul. Karla Marxa 16/2, Ufa 450054, Russia

I. Ivanov

Ufa Institute of Biology of Ufa Federal Research Center of the RAS

ul. Karla Marxa 16/2, Ufa 450054, Russia

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