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Leila Hatami-Baroogh Shahnaz Razavi Hamid Zarkesh-Esfahani Marziyeh Tavalaee Somayeh Tanhaei Kamran Ghaedi Mohamad Reza Deemeh Farzaneh Rabiee Mohammad Hossein Nasr-Esfahani 《Reproductive biology and endocrinology : RB&E》2010,8(1):17
Background
Leptin, a 167 amino acid peptide hormone, profoundly effects reproduction exerting its biological effects via interaction with the leptin receptor (ObR) which is widely expressed on peripheral tissues. In this study, we have attempted to assess leptin receptor expression in the spermatozoa of fertile males and those diagnosed with male factor infertility; both at the mRNA or protein levels. 相似文献42.
We studied the inflorescence, and in particular ontogeny and development of the florets in Senecio vernalis as a representative member of Asteraceae, using epi-illumination microscopy. Initiation and subsequent development of florets on the highly convex inflorescence apex occur acropetally, except for pistillate ray florets, which show a lag in initiation. Receptacular bracts derive from the receptacular surface after development of all florets. The order of whorl initiation in both disc and ray florets include corolla, androecium and finally the pappus, together with the gynoecium. Development of corolla lobes from a ring meristem occurs in bidirectional order starting from the lateral side, whereas stamens incept unidirectionally from the abaxial side. Concurrently with the inception of two median carpel primordia, a ring meristem develops at the base of the corolla from which pappus bristles differentiate in later stages. Pistillate ray florets show significant differences from perfect disc florets as reflected by the zygomorphic shape of the floral apex and a shift of floral merosity from pentamery to tetramery. Loss of stamens in ray florets occurs due to abortion of primordia after initiation. 相似文献
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Quercetin: A functional dietary flavonoid with potential chemo‐preventive properties in colorectal cancer 下载免费PDF全文
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Hypermethylation of IL‐10 gene is responsible for its low mRNA expression in Behçet's disease 下载免费PDF全文
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Somayeh Naghiloo Masumeh Khodaverdi Sedigheh Nikzat Siahkolaee Mohammad Reza Dadpour 《Plant Systematics and Evolution》2014,300(6):1269-1283
A comparative study of floral ontogeny and development was carried out on three genera (Marrubium L., Phlomis L., Stachys L.), representing three tribes of Lamioideae (Marrubieae, Phlomideae, Stachydeae) using epi-illumination light microscopy. The sequence of organ whorl appearance in all three genera is sepals, petals plus stamens, and carpels. Sepal appearance is reversed unidirectional starting from the adaxial side in all except Phlomis, which is unidirectional. Order of petal appearance is bidirectional in Marrubium and Stachys, and simultaneous in Phlomis. Stamens appear unidirectionally starting from the adaxial side in all except in Phlomis, which has an abaxial to adaxial unidirectional sequence. Significant developmental features distinguishing the three genera from each other include (1) weakly monosymmetric, elongated calyx tube, five-lobed corolla, divergent anthers with thecae transverse to the filament, unequally bifid stigma and ovary with glandular hairs in Marrubium; (2) actinomorphic hairy calyx, four-lobed corolla and unequally bifid stigma in Phlomis; and (3) glabrous calyx, equally bifid stigma and symmetric disc nectary in Stachys. Our results indicate some potential for floral ontogenetic features in delimiting the different tribes. The hypothetical evolutionary pathway of organogenesis sequences is discussed. 相似文献
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