| Pak. J. Bot., 37(1): 131-139, 2005. | Back to Contents | ||||
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Updated: 09-07-09 | ||||
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SALINITY EFFECTS ON SEEDLING GROWTH AND YIELD COMPONENTS OF DIFFERENT INBRED RICE LINES AISHA SHEREEN, S. MUMTAZ, S. RAZA, M.A. KHAN AND S. SOLANGI
Abstract:
Water culture studies of short (seedling stage) and long term (maturity)
stage were conducted to evaluate the effect of different levels of
salinity (0, 50, 75 mM NaCl) on the growth, yield and yield components
of different inbred rice lines. Studies at seedling stage showed
significant growth reduction in term of leaf mortality and shoot fresh
weight in all tested lines under salinity. However, the rate of
reduction varied among different lines. Variable responses to salinity
have been observed at vegetative and reproductive stages. The lines
which have shown tolerance at seedling stage exhibited greater reduction
in their grain production. All yield contributing characters like
fertility, tiller numbers, panicle number and panicle length were
significantly reduced under salinity. Among these contributing
characters sterility was found to be major cause of yield losses under
saline conditions. Nuclear Institute of Agriculture, Tandojam, Pakistan. |
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