the endosperm as a storage tissue and the large size of the normal caryopsis. Cytogeneticists interested in the cereals were early impressed, accordingly, with the importance of this stage in the life cycle of the plant for the general problem of hybrid incompatibility. It is not surprising to find, therefme, that a larger amount of work has been directed toward discovering the basis of hybrid ...

Cinnamomin is a novel type II ribosome-inactivating protein (RIP) isolated in our laboratory from the seed of the camphor tree (Cinnamomum camphora). In this paper the physiological role it plays in the plant cell was studied. Northern and Western blotting revealed that cinnamomin was expressed specifically in cotyledons. It accumulated in large amounts simultaneously with other proteins at the...

The sesquiterpene lactone glaucolide B (1), isolated from Vernonia fruticulosa (Asteraceae), was transformed into six lactones (2-7). The structures of the products were elucidated by spectroscopic analysis. A series of solutions of compounds 1-7, at 200 microM, were tested on the germination and on the root and shoot growth of the dicotyledons Physalis ixocarpa and Trifolium alexandrinum and o...

Chalkiness is a key determinant that directly affects the appearance and cooking quality of rice grains. Previously, Floury endosperm 2 (FLO2) was reported to be involved in formation chalkiness; however, its regulation mechanism still unclear. Here, FLO2 interaction factor 3 (OsFIF3), bHLH transcription factor, identified analyzed Oryza sativa. A significant increase chalkiness observed OsFIF3...