Figure 1.

Morphological alterations of reproductive organs in wild type plants of Arabidopsis (cv. Columbia-0) by heat stress. Plants in reproductive stage were subjected to daily heat stress for 5–9 days (Heat 5–9) or 10–14 days (Heat 10–14). (A–C) Flowers under control or heat stressed condition. (D–F) Flowers after the removal of petals and sepals for the observations. (G–I) Top view of flowers. (J) Flower length. (K) Stigma diameter. (L) Stigma area. (M) Length between style and ovary. (N) Anther length. (O) Filament length. (P) Petal length. (Q) Sepal length. White bars in pictures indicate 1 mm. Bars in graphs indicate standard error. *, ** and ***: Student t-test significant at p < 0.05, p < 0.01 and p < 0.005, respectively compared to control (n=6–20).