sporopollenin/atrophy

The development of the sporopollenin orbicules (Ubisch bodies) on the tapetal cells of Lilium begins while the spores are still enclosed in the meiotic tetrads. Spherosome-like structures, the pro-orbicular bodies, accumulate in the vicinity of the plasmalemma early in the tetrad period, and are

As a complex wall system in flowering plants, the pollen outer wall mainly contains aliphatic sporopollenin; however, the mechanism for synthesizing these lipidic precursors during pollen development remains less well understood. Here, we report on the function of the rice tapetum-expressing TDR

Foliar application of 1.5% benzotriazole induced 100% pollen sterility in H. annuus. Pollen abortion in treated plants was mainly associated with abnormal behaviour of tapetum. A limited number of anther locule showed early degeneration of tapetum followed by disintegration of sporogenous tissues.

The precisely timed process of tapetum development and its degradation involving programmed cell death is an important molecular event during anther development. Through its degeneration, the tapetum not only provides nutritive substances to the developing microspores but also contributes to the

In flowering plants, the exine components are derived from tapetum. Despite its importance to sexual plant reproduction, little is known about the translocation of exine materials from tapetum to developing microspores. Here we report functional characterization of the arabidopsis WBC27 gene. WBC27

7365AB, a recessive genetic male sterility system, is controlled by BnMs3 in Brassica napus, which encodes a Tic40 protein required for tapetum development. However, the role of BnMs3 in rapeseed anther development is still largely unclear. In this research, cytological analysis revealed that anther

The fertile and sterile anthers of a Chinese cabbage (Brassica campestris L. ssp. chinensis Makino) were observed using electron microscope to find the ultrastructural feature of sterile anthers. The earliest abnormal phenomenon in sterile anther was nucleolus of sporogenous cells locating in the

The lipoxygenase (LOX) activity was determined in almost isogenic types of barley (Hordeum vulgare L.): normal cv. Adorra, cytoplasmic male sterile (msm1), and msm1 barley with restored fertility, heterozygous for the Rfm1a restorer gene. The LOX activity was lowest in male steriles in the leaf

Ogura cytoplasmic male sterility (CMS) contributes considerably to hybrid seed production in Brassica crops. To detect the key protein species and pathways involved in Ogura-CMS, we analysed the proteome of the cabbage Ogura-CMS line CMS01-20 and its corresponding maintainer line F01-20 using the

CONCLUSIONS An ABC transporter gene ( OsABCG15 ) was proven to be involved in pollen development in rice. The corresponding protein was localized on the plasma membrane using subcellular localization. Wax, cutin, and sporopollenin are important for normal development of the anther cuticle and pollen

Plant male reproductive development is a complex biological process, but the underlying mechanism is not well understood. Here, we characterized a rice (Oryza sativa L.) male sterile mutant. Based on map-based cloning and sequence analysis, we identified a 1,459-bp deletion in an adenosine

The specialized multilayered pollen wall plays multiple roles to ensure normal microspore development. The major components of the pollen wall (e.g. sporopollenin and lipidic precursors) are provided from the tapetum. Material export from the endoplasmic reticulum (ER) is mediated by coat protein

Male reproductive development involves a complex series of biological events and precise transcriptional regulation is essential for this biological process in flowering plants. Several transcriptional factors have been reported to regulate tapetum and pollen development, however the transcriptional