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Articles by Mumtaz Ali Sethar
Total Records ( 2 ) for Mumtaz Ali Sethar
  Mumtaz Ali Sethar , Vajanti Mala Pahoja and Qamaruddin Chachar
  The research work was conducted to elucidate the heat acclimation potential of two promising cotton cultivars Rehmani and S-12 . The plants were hardened for 1 to 7 days at 43ºC for 2h. After every hardening treatment the leaves were heat stressed at 45ºC for 2h. The chlorophyll fluorescence (Fv/Fm) ratio was recorded at pre-incubation, during heat stress and recovery after heat stress. The results showed that cv. Rehmani gave better results only after 1 day hardening treatment but after 2 to 7 days treatments the Fv/Fm ratio declined. However, cultivar S-12 showed good acclimation response as the treatment days were increased to 7-days hardening treatment the Fv/Fm ratio increased to 83% of the control treatment (no hardening).
  Mumtaz Ali Sethar , D.L. Laidman , Vajanti Mala Pahoja , Qamaruddin Chachar and Muhammed Ashraf Mirjat
  The objective of the study was to ascertain the effects of high temperature stress on root growth of cotton genotypes viz. Qalandari, MNH-93, Rehmani, 5-12, CIM-70, SLH-41, MS-84, K-68-9, CRIS-6 and CiM-109. The seeds were germinated for 48h at 25+0.5°C. After 48 h they were heat stressed for 2 h at 25 (internal control), 30, 35, 37.5, 40, 42.5 and 45°C in a waterbath and re-incubated at 25°C for a further 22 h, making a total germination period of 72 h. The root growth in all cultivars showed a good tolerance upto 35°C. At 45°C the roots of all cultivars were irreversibly damaged. Between 35 and 45°C the cultivars behaved differently, however. Cultivars Qalandari and Rehmani were more heat tolerant, and cv. 5.12 least heat tolerant.
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