Journal
PLANT AND CELL PHYSIOLOGY
Volume 50, Issue 4, Pages 889-903Publisher
OXFORD UNIV PRESS
DOI: 10.1093/pcp/pcp038
Keywords
Gene expression; Leaf; Maize; Removal of stress; Root; Salt stress
Categories
Funding
- The National Basic Research Program of China [973, 2006CB101700]
- Ministry of Agriculture of the Peoples Republic of China 948 Program of Introduction of Advanced Science and Technology of International Agriculture [2001-205]
- the Development Program for Guangxi Science and Technology Research [0228019-6]
- the Opening project of Guangxi Key Laboratory of Subtropical Bioresource Conservation and Utilization [5B0601]
Ask authors/readers for more resources
We studied the transcriptional profiles of leaves and roots of three-leaf stage seedlings of the maize inbred line YQ7-96 under conditions of salt stress (100mM NaCl) and removal of salt stress (RSS). A total of 296 genes were regulated specifically by the stress, of which 206 were specific to leaves and 90 were specific to roots. Stress-regulated genes were classified into eight and seven expression patterns for leaves and roots, respectively. There were 60 genes which were regulated specifically by RSS, 27 of which were specific to leaves and 33 specific to roots. No genes were found to be co-regulated in tissues and to be regulated commonly by the stress and RSS. It can be concluded that (i) at the early stage of the stress, transcriptional responses are directed at water deficit in maize leaves but at both water deficit and Na accumulation in roots; (ii) at the later stage, the responses in leaves and roots result from dual effects of both water deficit and Na accumulation; (iii) the polyamine metabolic pathway is an important linker for the co-ordination between leaves and roots to accomplish the tolerance of the whole maize plant to the stress; (iv) the stress can lead to genomic restructuring and nuclear transport in maize; (v) maize leaves are distinct from roots in terms of molecular mechanisms for responses to and growth recovery from the stress; and (vi) mechanisms for the maize responses to the stress differ from those for their growth recovery during RSS.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available