Figure 1.

Morphological and histological analyses of control and heat-stressed seeds. A and B, Mature seed phenotypes resulting due to a short period of heat stress. The heat stress was imposed at 24 HAF for 24 to 72 h, and then plants were maintained under normal conditions (28°C) until maturity. NS, Nonstressed; MS, moderate stressed; SS, severe stressed; 24H, 48H, and 72H indicate the hours of stress treatment. Bars = 1 mm. C to J, Sections of nonstressed (C–E), moderate-stressed (F and G), and severe-stressed (H–J) young seeds at 48 HAF (C, F, and H), 72 HAF (D, G, and I), and 96 HAF (E and J). Bars = 200 μm.