Salt stress is one of the key abiotic stresses that affect both the
qualitative and quantitative characters of many Brassica rapa sub-species by
disturbing its normal morphobiochemical processes. Therefore, the present
research work was designed to study the effect of different NaCl events (0,
50,100 and 150 mmol) on morphological and biochemical characters and to
screen salt tolerant genotypes among brown, yellow and toria types of B. rapa
sub-species. The plants were grown in test tubes with addition of four level
of NaCl (0, 50,100 and 150 mmol). The effect of salinity on shoot and root
length, shoot/ root fresh and dry weight, relative water content (RWC),
proline and chlorophyll a, b, a+b contents was recorded after 4 weeks of
sowing. The genotype 22861 (brown type) showed excellent morphological and
biochemical performance at all stress levels followed by Toria-Sathi and
Toria-A respectively as compared to Check variety TS-1. The genotype 26158
(yellow type) gave very poor performance and retard growth. The %RWC values
and chlorophyll a, b and a+b contents were decreased several folds with the
increase of salt concentration. While, the proline contents was increased
with raising of salt stress. The brown and toria types showed maximum
tolerance to salt stress at early germination stages as compare to yellows
one. The present study will serve as model to develop quick salt tolerant
genotypes among different plant sub-species against salt stress.
Micropropagation of banana (Musa spp) using temporary immersion bioreactor system
