Role of adventitious roots in water relations of tamarack (Larix laricina) seedlings exposed to flooding.

ABSTRACT:

Background

Flooding reduces supply of oxygen to the roots affecting plant water uptake. Some flooding-tolerant tree species including tamarack (Larix laricina (Du Roi) K. Koch) produce adventitious roots in response to flooding. These roots were reported to have higher hydraulic conductivity under flooding conditions compared with non-adventitious roots. In the present study, we examined structural and functional modifications in adventitious roots of tamarack seedlings to explain their flooding tolerance.

Results

Seedlings were subjected to the flooding treatment for six months, which resulted in an almost complete disintegration of the existing root system and its replacement with adventitious roots. We compared gas exchange parameters and water relations of flooded plants

SUBMITTER: Calvo-Polanco M 

PROVIDER: S-EPMC3431261 | biostudies-literature | 2012 Jun

REPOSITORIES: biostudies-literature