The role of seed viability in the development of corky tissue in sapota (Manilkara achras) fruit in India

Prevention of Incidence of Corky Tissue Disorder in Sapota cv. Cricket Ball Fruits by Preharvest Spray Treatment

“…As a result of treatment with spray formulation (Table 1) (Table 3). Past studies had shown that under rain-fed system of cultivation, the phenomenon of "reverse flow" of water and nutrients from fruit to shoot occurred in sapota [1] associated with a higher rate of incidence of corky tissue. It was clearly evident that during water stress, the emerging shoots got higher priority for the available water compared to developing fruits resulting in a continuous drain of moisture from fruit to shoot [15].…”

“…It was clearly evident that during water stress, the emerging shoots got higher priority for the available water compared to developing fruits resulting in a continuous drain of moisture from fruit to shoot [15]. Consequently, the reduction in moisture content of the pulp triggered a host of biochemical changes leading to the development of corky tissue in sapota characterized by partially dehydrated mesocarp tissue with plasmolyzed cells [1]. In the light of the above, it was clearly apparent that the reduction in the rate of incidence of corky tissue from 50.0% in control to 5.1% in fruits treated with spray formulation was the result of the cessation of reverse flow from fruit to shoot.…”

“…A major constraint for the commercial production of superior quality of fruits of cv. Cricket Ball under rain-fed conditions is the incidence of the physiological disorder known as Corky Tissue (CT) with the rate of occurrence as high as 80% during summer [1]. Corky tissue of sapota is characterized by partially desiccated pulp with a hard lump occurring close to the skin of the ripe fruit and is rather sour to taste [2].…”

Gallic acid content in sapodilla fruit and seed (Manilkara zapota) and the correlation with germination control in recalcitrant seed

“…That is because the storage treatment creates environmental conditions with low humidity or a tendency to dry out, which causes a decrease in seed moisture content and decreases the seeds' viability. Recalcitrant seeds are very sensitive to dry environmental conditions (Shivashankar et al, 2015). The reduced viability of sapodilla seeds can be proven by the tetrazolium test of sapodilla seeds that has been carried out, and the results showed a decrease in seed viability by 45% after 10 days of storage (Table 9).…”

“…According to research conducted by Shivashankar et al (2015), sapodilla seeds experience a process of losing seed moisture content very rapidly during the first ten days of storage. Loss of moisture content decreases the ability of seeds to germinate.…”