The full range of gene expression leading to male gamete formation in flowering plants begins with determination of the stamen whorl in flower development and ends with release of mature sperm into the embryo sac near the egg and central cell. In this review we focus on events within the anthe...
To examine variability in pollen number on a species-wide scale, we determined pollen number per flower in 144 natural A. thaliana accessions (Fig. 1a–d; Supplementary Table 1 and Supplementary Data 1) and found approximately fourfold variation (average ~4000) (Fig. 1e). Histological sections...
In summary, external morphology and gametophyte development in pecan staminate flowers were consistent to related; thus, the internal gamete development status can be determined from external morphological characteristics of the flower. This provided a sampling basis and theoretical foundation for in vitro...
Each spermatozoon can fuse with a larger female gamete or ovum, in the process of fertilization. ... Malè is a comune (municipality) in the province of Trento in the Italian region Trentino-Alto Adige/Südtirol, located about 35 km northwest of Trento. As of 31 December 2004, it had a...
While a seif-fertilising plant makes equal male and female gamete contributions to the next generation, so that male gamete contributions can be extrapolated from data on functional embryo sacs, this situation need not hold in outcrossing plants. Here the 1 1 ratio between male and female ...
Magalhaes De Souza, Margarete; Martins, Ernane Ronie; Pereira, Telma Nair Santana; De Oliveira, Luiz Orlando 2003: Reproductive studies in ipecac A Rich; Rubiaceae Flower bud and anther size associated to male gamete development stages Cytologia 68(4): 351-356 Tatone, C.; Di Emidio, G.; ...
The male gametophyte in angiosperms is a pollen grain. It reaches the stigma of the flower by different pollinators called the phenomenon pollination...Become a member and unlock all Study Answers Start today. Try it now Create an acc...
GAMETE INTERACTIONS DURING DOUBLE FERTILIZATION REPULSION SIGNALING AND PREVENTION OF POLYSPERMY SELF-INCOMPATIBILITY (SI) SYSTEMS CROSSTALK DURING BRASSICA SI S-RNASE SI SIGNALING THE PAPAVER SI SYSTEM CONCLUSIONS AND PERSPECTIVES FUNDING REFERENCES Cited by (280) Figures (2)Volume...
The law of survival of the fittest play a selective action during the formation stage of gamete and before its gametogamy, then only the most adaptable gamete can through fecundatin to emerge zygocyte in external environmental condition. Male gametophytic selection is known as a powerful ...
In addition, we found a non-significant but intriguing trend for male-sterile plants to produce more seeds per flower than fertile siblings after supplemental pollination. Such pleiotropic effects may underlie the corolla dimorphism frequently observed in gynodioecious taxa and may affect selection on ...