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Not AvailableWith devastating increase in population there is a great necessity to increase crop productivity of staple crops but the productivity is greatly affected by various abiotic stress factors such as drought, salinity. An attempt has been made a brief account on abiotic stress resistance of major cereal crops viz. In spite of good successes obtained on physiological and use molecular biology, the benefits of this high cost technology are beyond the reach of developing countries. This review discusses several morphological, anatomical, physiological, biochemical and molecular mechanisms of major cereal crops related to the adaptation of these crop to abiotic stress factors. It discusses the effect of abiotic stresses on physiological processes such as flowering, grain filling and maturation and plant metabolisms viz. photosynthesis, enzyme activity, mineral nutrition, and respiration. Though significant progress has been attained on the physiological, biochemical basis of resistance to abiotic stress factors, very little progress has been achieved to increase productivity under sustainable agriculture. Therefore, there is a great necessity of inter-disciplinary research to address this issue and to evolve efficient technology and its transfer to the farmers' fields.Not Availabl

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Not AvailableStress is a global threat in achieving potential crop yield. Abiotic stresses like drought, salinity, heat stress and other abiotic stresses associated several associated with ever increasing human populations affect crop productivity drastically under sustainable agriculture in the farmers elds. Though signicant research activities have been taken place to address these problems with respect to the mechanism of resistance and crop improvement but little progress has been achieved. Here, several low cost technologies have been developed for screening crop cultivars for few abiotic stresses viz. screening for tolerance to salinity, drought, heat stress, ooding and cold stress. Seedling Emergence percentage, tap root length and number of lateral roots was considered important parameters for selection of salinity tolerant hybrids in cotton. Salinity tolerant genotypes showed high emergence percentage under saline concentration compared to remaining genotypes. These hybrids produced more number of profuse lateral roots and long tap roots in saline concentration compared to control for osmotic adjustment and increase in tap root length. 90% of seeding survival may be selected for heat tolerant at seedling stage. These hybrids may be recommended for growing under heat and drought stress prone areas for better adaptation. Hybrids with thick leaves, stout petiole, good survival under drought & recovery from stress are considered for selecting drought resistant hybrids in castorNot Availabl

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Some aspects on pharmacognosy of ten species of the family solanaceae utiliz

In the present work ten species of the family Solanaceae were studied applyingtechniques of pharmacognosy and histochemistry for the differentiation and identificationof each of the species. The anatomical characteristics used in the differentiationof the species are the types of trichomes, stomatas, crystals, glands, andposition of pallisade parenchyma. In the histochemical tests the species presentdifferent grades of reaction in the contents of proteins, tannin, and alkaloids