Role of artificial ageing technique on different physiological and biochemical parameters of seed in soybean, Gfycine max (L.) Merr.

摘要

The life span of seeds of different plant species varies widely when stored under identical conditions. Some seeds are poor storers with relatively shorter period and some are good storers with longer storage period. A third category includes seedshaving intermediate storability. However, the differences in seed longevity are not limited to species only, as several studies showed that the principles prevailing at the species level are also applicable at the genotype/variety level, at least in somecrops. During storage, some physiological, biochemical and genetic changes occur in the seeds (Roose, 1980). The extent and rate of deterioration within a seed lot at the time of storage reflect the pre-storage history of the seed lot viz., weathering,time of harvest, harvesting procedure, drying, handling and conveying, treating and so on. Since, the pre-storage history of seed lots differs their physiological conditions, hence suitability for storage also differs markedly. There is inverse relationship between seed vigour and seed deterioration. Vigour decreases as the level of deteriorative process is greatly increased by exposing them to very adverse levels of the two most important factors influencing the rate of deterioration: temperature and relative humidity (Delouche and Baskin, 1973). The accelerated ageing test was first developed to measure the relative storability of seeds (Delouche, 1965; Delouche and Baskin, 1973). This test has been found to be correlated with seed vigour in soybean(Byrd and Delouche, 1971). The present study was conducted to ascertain the effect of artificial ageing on different physiological and biochemical parameters of seed quality in soybean.