Impact of pre-storage seed invigoration in ash gourd [Benincasa hispida (Thunb.) Cogn.]

Abstract

Ash gourd is widely cultivated as a vegetable crop in Kerala. In the state, prolonging seed longevity is a major concern as the prevailing hot humid conditions accelerates deterioration of seeds leading to rapid loss of viability during storage. Seed deterioration due to ageing is indeed inevitable and irreversible phenomenon, the best that can be done is to lower its rate (Coolbear 1995). It is reported that seed priming technology helps in rapid and uniform germination and emergence of seeds and impart a great tolerance to adverse environmental conditions (Heydecker et al. 1973). A study conducted at KAU on the storability of invigorated seeds of ash gourd variety KAU local had revealed that viability of the invigorated seed was maintained above the Indian minimum seed certification standards (IMSCS) for seven months after storage (MAS) under ambient condition (Shobha 2016). Considering all the above, the present study was formulated to elucidate the effect of seed invigoration on viability and quality of seeds stored under ambient and refrigerated environment.