Nutritional Value, In Vitro Regeneration and Development of Transgenic Cucurbita pepo and C. maxima for Stress Tolerance: An Overview

Abstract

The Cucurbita genus, often called as cucurbits, include several economically important fruits and vegetable crops like cucumber, gourds, squash, watermelon, pumpkin, and melon. Several of the species including Cucurbita pepo and C. maxima have nutritional value and are utilized in folk medicine for treating gastrointestinal diseases and intestinal parasites. Such an activity is attributed to the presence of fatty acids, glycosides, resins, sterols, carotenoids, phenols, tocopherols, saponins, steroids, and terpenoids such as cucurbitacins. Squash and pumpkin are the major members of Cucurbitaceae family used as food and animal feed. The two major pumpkin varieties C. pepo and C. maxima are considered as highly polymorphic with manifold nutritional, including food preservative abilities and medicinal activities. Development of transgenic pepo for tolerance to various biotic and abiotic stresses coupled with nutritional value is the need of the hour. Very few reports are available on transgenic production of pepo. The present review summarizes the regeneration and transformation protocols for developing transgenic C. pepo and C. maxima and future prospects.