The Role of DELLA Proteins in Sexual Reproduction of Angiosperms

doi:10.11983/CBB17220

Abstract

Abstract: In angiosperms, DELLA proteins (DELLAs) have emerged as the master transcriptional regulators responsible for repressing all aspects of gibberellin (GA)-dependent growth and development. Previous investigations have demonstrated that DELLAs are involved in almost all processes of plant development. The evidences indicate that DELLA ex- pressed in male reproductive organs, female reproductive organs and embryos in flowering plants and play a major role in diverse key events in the process of sexual reproduction of angiosperms. Here, we try to summarize the knowledge of DELLAs concerning the structural components, characteristics, expression and function in reproductive tissues during the process of plant sexual reproduction. The problems and perspectives are also discussed.

Key words: DELLA, gibberellin, sexual plant reproduction

Shi Ce, Luo Pan, Zou Jie, Sun Mengxiang. The Role of DELLA Proteins in Sexual Reproduction of Angiosperms[J]. Chinese Bulletin of Botany, 2018, 53(6): 745-755.

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URL: https://www.chinbullbotany.com/EN/10.11983/CBB17220

https://www.chinbullbotany.com/EN/Y2018/V53/I6/745

Figures/Tables 2

Figure 1 Functional domains, phylogenetic tree and conversed motif location of DELLAs reported in plant(A) Diagram of the structural domain and relative functions of DELLA protein. (B) DELLAs are classified into 3 categories: one clade is monocot, the other two are dicots. The tree is calculated with Mega 5.1 software using the Neighbor-joining method. Motifs in DELLA protein sequences were identified with the MEME tool (http://meme.nbcr.net). (C) 10 discovered motifs of DELLA protein via MEME tool. DELLAs include all the conserved motifs: DELLA, LHRs, VHIID, PFYRE and SAW.

Figure 2 The role of DELLA protein in sexual reproduction of angiosperm DELLAs play a key role in plant sexual reproduction including pollen viability and quantity, pollen wall formation, the growth of pollen tube, stigma morphogenesis, style elongation and integument development.

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