RF-amide related peptide (RFRP) is the orthologue of gonadotropin-inhibitory hormone (GnIH) in mammals. The bodies of RFRP cell are located in the dorsomedial nucleus of the hypothalamus (DMH) and the fibers project to preoptic area (POA) and median eminence of the hypothalamus. Its receptor mainly distributes in hypothalamus. RFRP fibers project to GnRH cells to regulate mammalian reproduction axis. This paper reviews the progress of current researches on RFRP in regulation of animal behaviors, including reproduction, food intake, anxiety and stress response.
Animals ; Behavior, Animal ; physiology ; Mammals ; physiology ; Neuropeptides ; physiology ; Reproduction ; physiology

A field investigation was conducted on the floral syndrome and breeding system of Corydalis edulis located in natural populations in campus of Anhui Normal University by out-crossing index, pollen-ovule ratio, artificial pollination and bagging experiment. The results showed that the plant was in bloom from March to May and flowering span among populations was 72 days. The flowering span for a raceme was 14-24 days. The life span of one single flower was approximately 5-10 days. Spatial positioning of stigma and anthers were spatially desperation on the day of anthesis. The filaments were shorter than the styles through pollen vitality and stigma receptivity experiments. A self-pollination breeding system was reflected by OCI 3, pollinators were required sometimes; A complex cross bred was indicated by P/O = 857.14, combined with the results of the bagging and artificial pollination experiment, the breeding system of C. edulis was mixed with self-pollination and outcrossing. The special floral structure and pests destroying may have a certain impact on seed-set rate.
Breeding ; Corydalis ; physiology ; Flowers ; physiology ; Pollination ; physiology ; Reproduction ; physiology

This review focuses on the role of estrogen in men, mainly in male reproduction. The continuing increase in data obtained, and recent discoveries in this area will enable a better understanding of male physiology; these, in turn, will have important clinical implications.
Estrogens ; physiology ; Genitalia, Male ; physiology ; Humans ; Male ; Reproduction ; physiology

OBJECTIVETo study four kinds of germplasm resources of Codonopsis pilosula and provide the basal mating systems data for the breeding and cultivation of C. pilosula.

METHOD0.5% TTC (2,3,5-triphenyl tetrazolium chloride) solution was used for the pollen viability test and benzidineand-H2O2 [1% benzidine in 60% ethanol,hydrogen peroxide (3%), and water, 4:11:22] was used for estimation of the stigma receptivity. The mating systems were tested by out crossing index (OC1), pollen-ovule ratio (P/O) and pollination by bagged and emasculated in the field.

RESULTThe pollen viability of C. pilosula reached highly about 80% when the pollen staying in the anther, 2-3 days before the petals opening. The anther began scattering pollen before the day of the petals opening, the pollen viability was the highest about 95%, the pollen stick thickly aroud the stigma and quickliy lost in the next day. The stigma life-span was about 4-5 days, the optimal time for pollination was the first day of the petals opening, when the stigma was highly sticky and yellow. The value of out crossing index (OC1) was 4, pollen-ovule ratio was between 104.84-185.75. The natural fructification rate of cross-pollination by emasculated-treatment was 25.6% 42.4%. The fructification rate and compatible index of self-pollination by bagged- treatment were about 3.3%-6.7% and 3.0-21.8.

CONCLUSIONThe mating system of C. pilosula is mixed with self-pollination and cross-pollination, prone to cross-pollination. The compatibility of self-pollination is high. The difference of maturing period of pistil and stamen and the lack of polen amount cause low fructification rate of self-pollination.

Codonopsis ; physiology ; Flowers ; physiology ; Ovule ; physiology ; Plants, Medicinal ; physiology ; Pollen ; physiology ; Pollination ; physiology ; Reproduction ; physiology

In order to get to know the imitation of wild Gastrodia elata in life history and phenology period, by G. elata f. elata forest wild simulated cultivation in Dafang county, Guizhou province, observing and recording its morphological characteristics of each growth and development stage. This experiment summarized the law of its life history over 24 months, amplified the characteristics of each 5 phenology periods over the sexual and asexual reproduction of wild simulated cultivated G. elata f. elata in Guizhou. Which the results could clear the process of wild simulated cultivated G. elata f. elata in Guizhou, and provide a theoretical support for the standard technical of the simulated wild G. elata.
Gastrodia ; growth & development ; physiology ; Life Cycle Stages ; physiology ; Reproduction

Animals ; Behavior, Animal ; Reproduction ; physiology ; Social Behavior ; Tupaiidae ; physiology

OBJECTIVETo provide the basal data for the breeding and cultivation of Platycodon grandiflorum.

METHODThe field investigation and pollination by bagging were carried out. TTC(2,3,5-triphenyl tetrazolium chloride) solution was used to test the pollen vigor.

RESULTThe stigma life-span of P. grandiflorum was about 9 days, however the optimal time for pollination is 4-6 days after the petals opening, with the stigma was splitting lightly or significantly. When the petals opened, the anther began scattering pollen, and finished in the same day. The pollen vigor was about 81.4% at the beginning, and decreases to 27.6% three days later. The pollen vigor still remains 64.4% three days later, when the flower was kept in the desiccant. The natural fructification rate of self-flower-pollination was 4.8%. The fructification rate and compatible index was about 62.7% and 54.6, respectively, when the self-plant-pollination performed by hand. They decreased to 12.8% and 6.5 when the pollination was implemented during the flowering period.

CONCLUSIONLow fructification percentage of self-flower-pollination attributes to the difference of maturing period of pistil and stamen, as well as the short pollen life-span of P. grandiflorum. The compatibility of self-plant-pollination is high during flowering period when pollination performed by hand. The life-span of the pollen can be prolonged significantly when keeping in the dry environment.

Flowers ; physiology ; Plants, Medicinal ; growth & development ; physiology ; Platycodon ; growth & development ; physiology ; Pollen ; physiology ; Reproduction ; physiology

OBJECTIVETo study the characteristics of pollen viability and stigma receptivity of C. deserticola and provide theory basis for seed production and breeding of C. deserticola.

METHODDifferent physiological measurement methods were applied to evaluate pollen viability and stigma receptivity. The results of different methods were compared with the seed setting percentage of the cross-pollination in the field test and pollen germination percentage by fluoroscope observation methods. The changes of pollen vitality and stigma receptivity in different conditions were tested using proper methods.

RESULTThe optimum methods on pollen viability and stigma receptivity detection were MTT-test and Benzidine-Hydrogen Peroxide method respectively. Results showed that the mean pollen viability and stigma receptivity were both the highest in inchoate anthesis with pollen germination percentage up to 95%, and can maintain viable for 4-5 d, but at the lower temperature of 4 degrees C, the pollen can be stored up to 10 days.

CONCLUSIONThe physiological characteristics of pollen and stigma of C. deserticola displayed good ecological adaptation, which are much more adaptive to the large area of cultivation condition.

Adaptation, Biological ; Cistanche ; physiology ; Flowers ; anatomy & histology ; physiology ; Germination ; Pollen ; cytology ; physiology ; Pollination ; physiology ; Reproduction ; physiology

Exosomes ; physiology ; Female ; Genitalia, Female ; physiology ; Genitalia, Male ; physiology ; Humans ; Male ; Reproduction ; physiology

One of the main current trends of andrology is the paradigm shift from disease-oriented to health-oriented andrology. One of the major tasks we are faced with now is to establish an holistic concept of male reproductive health, then, starting from the needs and demands of male reproductive health, to identify the scope of andrology, as well as to develop a new research priorities and agenda. The progress and perspective of three main areas in the field of health-oriented andrology, namely, molecular andrology, andrology for aging and environment and male reproduction, were briefly reviewed and discussed.
Aging ; physiology ; Androgens ; deficiency ; Andrology ; Environment ; Health ; Humans ; Male ; Reproduction