Received: 21-03-2013
Accepted: 24-06-2013
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Physiological Responses of Some Groundnut Cultivars to Salinity
,
Bui The Khuynh
,
Bui Xuan Suu
,
Vu Dinh Chinh
,
Ninh Thi Phip
,
Dinh Thai Hoang
Keywords
Groundnut, yield, salinity
Abstract
The pot experiment was conducted in net house to evaluate the effects of two salinity levels (NaCl 2‰ and 4‰) on the growth and yield of 6 local groundnut cultivars. The six groundnut cultivars are Sẻ Quảng Ngãi, Lạc, Lạc Quảng Trị, Mỏ két Tây Ninh, Giấy Tây Ninh, Đỏ Thái Bình. Results showed that salinity affected significantly growth and yield of groundnut. Increase in NaCl concentration decreased main stem height, dry matter weight, CO2 assimilation rate and triggered proline production in leaves of all cultivars. Besides, increase in level of salinity resulted in decrease of yield and yield components of groundnut. Among cultivars, Mo ket Tay Ninh obtained the highest pod yield at all salinity levels. In NaCl 4‰ treatment, the highest pod yield was found at Mỏ Két Tây Ninh (3.12g/plant), followed by Lạc Quảng Trị (3.04g/plant), Giấy Tây Ninh (3.03g/plant), Đỏ Thái Bình (2.79g/plant), Lạc (2.75g/plant) and Sẻ Quảng Ngãi (2.73g/plant), respectively. Among 6 varieties studied, Mo Ket Tay Ninh and Lac Quang Tri were believed to have good growth and yield performance and can be used as parental lines for salinity tolerance breeding in groundnut.
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