Figure 1.

Hypothesized working model for an understanding of the molecular and physiological mechanisms governing panicle development and degeneration. The black arrows show the direct association of specific factors with the panicle degeneration. The dotted red arrows show the regulation of panicle degeneration by controlling the expression of genes that are mentioned above the arrow. The T-head arrows show the negative association of genes with panicle degeneration. The question mark reveals the elucidation mechanism is not reported in studies yet.