The study was conducted on 10 pairs of eye balls to study the histomorphological structures of the vascular tunics of eye ball. The vascular layer includes the choroid, ciliary body and iris. The choroid was composed of four layers such as (i) Suprachoroid (ii) Large vessel layer (iii) Tapetum and (iv) Choriocapillary layer. The mean thickness of choroid at the center of the tunic was 76.55±3.7...

Ocular pigmentation in white cats with blue and yellow eyes and in Siamese cats was examined ophthalmoscopically and histologically. Yellow-eyed white cats had entirely normal ocular pigmentation. Blue eyes of white cats had normal pigmentation of the iridial and retinal pigment epithelia but no stromal pigmentation of the iris or choroid. This deficit is apparently due to the absence of stroma...

We report the unexpected findings of bilateral retinal astrocytic hamartomas in a giant panda. The eyes of Hsing-Hsing, a giant panda that had renal failure, chronic hypertension, degenerative joint disease, and progressive ulcerative keratitis, were examined grossly and histologically. Most of the findings were related to Hsing-Hsing’s debilitated condition or to normal anatomic variations bet...

A 355 cauliflower mosaic virus promoter and a tapetum-specific promoter were used to direct the synthesis in tobacco of preproactinidin and a derivative that lacked a C-terminal extension. Preproactinidin was processed into a form that migrated identically on protein gels with mature actinidin extracted from kiwifruit. This protein was proteolytically active in vitro, and high-level accumulatio...

Apomixis is a unique reproductive process that produces fertile offspring without the combination of sperm and egg cells. This perfectly reproduces maternal DNA, making it possible to fix heterosis during reproduction. Malus shizongensis newly discovered species closely related hupehensis Rehd. After de-male bagging, was found fruit set rate reached 78.7%. Preliminary analysis indicated M. have...

In this study, microspore formation (microsporogenesis), gamete (microgametogenesis), and pollen features of Silene sangaria, a species endemic to Turkey, was examined cytoembryologically histochemically. The is distributed along the Black Sea coast Turkey. materials were collected from Igneada village (Kirklareli province). anthers, separated by size, passed through ethyl alcohol concentration...

Cold stress modifies anthers' metabolic pathways to induce pollen sterility. Cold-tolerant plants, unlike the susceptible ones, produce high proportion of viable pollen. Anthers in susceptible plants, when exposed to cold stress, increase abscisic acid (ABA) metabolism and reduce ABA catabolism. Increased ABA negatively regulates expression of tapetum cell wall bound invertase and monosaccharid...