Proline accumulation in plants: a review
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Proline (Pro) accumulation is a common physiological response in many plants in response to a wide range of biotic and abiotic stresses. Controversy has surrounded the possible role(s) of proline accumulation. In this review, knowledge on the regulation of Pro metabolism during development and stress, results of genetic manipulation of Pro metabolism and current debate on Pro toxicity in plants are presented.
KeywordsOsmotic stress Genetic engineering Proline toxicity P5CS P5CR P5CDH PDH
ABA responsive element
Green fluorescent protein
Natural silencing RNA
Pentose phosphate pathway
Reactive oxygen species
The authors thank the Belgian Science Policy for financial support (project PAIVI/33, return grant of C.H).
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