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Metabolic response of roots to osmotic stress in sensitive and tolerant cereals- Qualitative <i>in vivo </i><span style="mso-bidi-font-style: italic">[<sup>31</sup>p] nuclear magnetic resonance study </span>

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Title Metabolic response of roots to osmotic stress in sensitive and tolerant cereals- Qualitative in vivo [31p] nuclear magnetic resonance study
 
Creator Nagarajan, Shantha
Dijkema, Cor
As, Henk Van
 
Description 149-152
High resolution [31p] nuclear magnetic resonance ( MR) spectroscopy was used to investigate
the changes in phosphate metabolism and intracellular pH in intact root segments of relatively osmotic stress sensitive
species maize (Zea mays
L) and insensitive species pearl
millet (Pennisetium americanum
(L) Leeke) exposed to hyper osmotic
shock. The results

were used to understand the adaptive mechanism of the
two species. The hyper osmotic shock resulted in large build-up of phosphocholine
and decrease in glucose 6-phosphate (G-6P) and UDPG levels in both the crops.
The osmotic shock produced a large vacuolar alkalinization and decrease in pH across tonoplast membrane in maize
roots. However, the roots of

pearl millet were able to adapt to the stress and
maintained pH gradient across
tonoplast with marginal vacuolar alkalinization. This may be attributed to the
sustained activity of primary tonoplast pumps and increased activity of H+-ATPase
that normally maintain pH gradient
across tonoplast.
 
Date 2012-12-24T18:37:36Z
2012-12-24T18:37:36Z
2001-06
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://hdl.handle.net/123456789/15286
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJBB Vol.38(3) [June 2001]