Dipartimento di Biologia, Università degli Studi di Milano, Via Celoria 26, 20133 Milano, Italy.
Dev Biol. 2010 Jan 15;337(2):294-302. doi: 10.1016/j.ydbio.2009.10.043. Epub 2009 Nov 6.
Gynoecium development is a complex process which is regulated by key factors that control the spatial formation of the apical, medial and basal parts. SHATTERPROOF1 (SHP1) and SHP2, two closely related MADS-box genes, redundantly control the differentiation of the dehiscence zone and promote the lignification of adjacent cells. Furthermore, SHP1 and SHP2 have shown to play an important role in ovule identity determination. The present work identifies a new function for these two genes in promoting stigma, style and medial tissue development. This new role was discovered by combining the shp1 shp2 double mutant with the aintegumenta (ant) and crabs claw (crc) mutants. In quadruple mutant flowers, the inner whorl is composed of unfused carpels which lack almost completely apical and medial tissues, a phenotype similar to the previously reported fil ant and lug ant double mutants.
雌蕊发育是一个复杂的过程，受到关键因子的调控，这些因子控制着顶端、中部和基部的空间形成。SHATTERPROOF1（SHP1）和 SHP2 是两个密切相关的 MADS-box 基因，它们冗余地控制着裂口区的分化，并促进相邻细胞的木质化。此外，SHP1 和 SHP2 已被证明在胚珠身份确定中发挥着重要作用。本工作鉴定了这两个基因在促进柱头、花柱和中部组织发育中的一个新功能。通过将 shp1 shp2 双突变体与 aintegumenta（ant）和 crabs claw（crc）突变体相结合，发现了这一新功能。在四倍体突变体花中，内轮由未融合的心皮组成，它们几乎完全缺乏顶端和中部组织，这种表型与先前报道的 fil ant 和 lug ant 双突变体相似。
