Abstract:
Groundnut variety Tissa (Arachis hypogea L.) is sensitive to both excessive and deficit water
which leads to decrease yield. We studied the growth and reproduction of Groundnut variety Tissa
due to 10 day water stress at different growth stages; vegetative (T2), flowering (T3) and at
maturity (T4). The study consisted with a control (Tl), with daily water supply through all growth
stages. Experiments were arranged in Complete Randomized Design with five replicates and the
experiment was repeated two times. AIL measured characters; Plant shoot length, Plant root
length, Number of pods, Seed weight were significantly affected by the water stress. Results
showed that water stress was highly significant for seed yield and Biological yield. The highest
seed yield was obtained by Tl (14.lg per plant) and the least seed yield belonged to T3 (1.9g per
plant). The highest number of pods per plant was obtained by T1 (12 per plant) and the least
number of pods per plant was obtained by T3 (5.2 per plant). Plants stressed during flowering stage
had the lowest pod and seed yield (1.9g) per plant. The mean root length was significantly higher
in T2 (27.58cm) compare to all other treatments. Water stress at vegetative stage induced flowering
than other treatments. The highest shoot length (80.15cm) was recorded in control treatment
whereas least height was recorded in T2 (54.1cm). Water stress reduced plant height in plants
stressed during the vegetative and flowering stages. Finally we confirm that water stress at
different growth stages; vegetative, flowering and maturity stage significantly affected to the
growth and reproduction of Groundnut variety Tissa in different ways. Our results indicated that
drought at flowering stage should be avoided to increase seed yield of Groundnut variety Tissa.
