Changes in physiological and biochemical parameters of promising mulberry (Morus indica L.) under water stress condition
1998
Singhal, B.K. | Roopa (Central Sericultural Research and Training Inst., Mysore - 570 008, Kamataka (India). Lab. of Mulberry Physiology)
Three promising mulberry (Morus indica L.) varieties viz. K-2, S-13 and V-1 have been evaluated for change in photosynthetic rate, carbohydrate, starch, fibre, ascorbic acid, carotenoids, protein, chlorophyll "a" and "b" and proline contents under water stress condition. The photosynthetic rate of the variety K-2 was drastically fallen from 17.39 in control to 5.21 micro mole/sq m/s under severe water stress condition. Though, carbohydrate and starch contents were not much affected under water stress of six days but decreased drastically under severe water stress. In control, ascorbic acid content of 3.089 mg/g was found in the variety S-13 as compared to 1.828 mg/g IN K-2 and 1.496 mg/g in V-1, but it was drastically reduced in the variety S-13 under water stress of only six days. Protein content was constantly reduced with water stress. Proline accumulation was found more in the variety V-1 under water stress condition. The varieties S-13 and V-1 are reported superior for physiological and biochemical parameters as well as for higher silk yield under irrigated condition, were found susceptible to water stress in the present study. It is suggested, therefore, that the varieties S-13 and V-1 can further be improved by breeders and better cultural practices for drought tolerance, so that, these promising varieties can emerge as a boon for the sericulture under water stress zones particularly for tropical countries
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