Hormonal Signaling in the Progamic Phase of Fertilization in Plants

Pollen–pistil interaction is a basic process in the reproductive biology of flowering plants and has been subject intense fundamental research that pronounced practical value. The phytohormones ethylene (ET) cytokinin (CK) together with other hormones such as auxin, gibberellin (GA), jasmonic acid (JA), abscisic (ABA), brassinosteroids (BRs) influence different stages plant development growth. Here, we mainly focus on information about ET CK signaling progamic phase fertilization. This occurs during male gametophyte development, including tapetum (TAP) cell death, pollen tube growth, synergid programmed death (PCD) self-incompatibility (SI)-induced PCD. joins coordination successive events developing anther, TAP anther dehiscence, microspore grain maturation, dehydration. Both take part regulation pollen–pistil interaction. accompanies adhesion, hydration, germination grains stigma growth tubes style tissues. Thus, production may be implicated pollination between organs accumulated transmitted to ovary ensure successful pollination. Some data suggest are involved S-RNase-based SI.