V. Iralu, K. Upadhaya and H. Choudhury
Abstract
Adinandra griffithii Dyer., a critically endangered species endemic to northeastern India, faces severe threats due to habitat loss and anthropogenic activities. This study investigates the germination behavior of A. griffithii seeds and evaluates the effects of GA3 treatments on germination rates under controlled laboratory conditions. Fresh seeds germinated within three weeks in both the moist filter and soil mixture experiments. Pre-soaking the seeds in GA3 solution promoted germination in the seeds. Analysis of variance (ANOVA) showed that the germination percentage (42%) of seeds treated with 500 mg l-1 GA3 was significantly higher (p<0.05) than all other treatments. A decline in germination percentage was observed with an increase in GA3 concentration. GA3-treated seeds showed a statistically longer mean germination time and T50 than non-treated seeds (p<0.05). Despite enhanced germination, seedling survival showed high mortality, particularly under shaded light conditions, with a mortality of 89% at the end of one year. Growing seedlings for up to three years before reintroduction in the field is suggested for higher survival. Introducing the species to botanical gardens and national parks can be an effective strategy for conservation and prevent the species from further decline.