Interspecific variation in sodium and potassium ion accumulation and essential oil metabolism in three Cymbopogon species raised under sodium chloride stress
1998
Ansari, S.R. | Abad Farooqi, A.H. | Sharma, S.
Responses of three Cymbopogon species (family Poaceae) were compared at three different levels of NaCl in water culture: 0 (control), 27 and 44 mM. The species differed considerably in their response to NaCl stress. In general, plant growth and essential oil content and yield decreased with an increase in water salinity in all the species. The decrease in oil yield was maximum in C. winterianus and least in C. flexuosus. Citral content increased under NaCl stress in C. flexuosus, while geraniol accumulation decreased in C. martinii. Maximum increase in sodium accumulation and decrease in K/Na ratio was observed in C. winterianus while sodium accumulation was least in C. martinii, particularly at 44 mM NaCl. C. flexuosus and C. martinii are suggested to be more tolerant of cultivation under saline stress than C. winterianus. Cymbopogon species accumulating less sodium and possessing high K/Na ratios under NaCl stress are suitable for adaptation for growth under saline conditions.
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