A Pollen tubes in the Col ecotype showed a uniform targeting of ovules throughout the pistil. Transcriptome changes for Arabidopsis in response to salt, osmotic, and cold stress. In order to balance X-linked gene dosage between the sexes, one X chromosome undergoes inactivation during development of female embryos.
Fruit number in relation to pollen production and viability in groundnut exposed to short episodes of heat stress. Physiological and proteomic approaches to address heat tolerance during anthesis in rice Oryza sativa L. This review describes studies of temperature stress on several crop plants, which suggest that pollen development and fertilization may often be the most sensitive reproductive stage.
Share on StumbleUpon. McCarrey 2. Inactivation of the Zfx gene on the mouse X chromosome. The study, reported in the Proceedings of the National Academy of Sciencesreveals that cilia in the efferent ductules, which carry sperm away from the testes, don't propel the sperm forward, as was once thought.
Dev Biol. In AprilJahner reported a peculiar coincidence.
Why should flat topped stoppers be laid with their flat sides on the table? Hundreds of millions of sperm must be released in order for fertilization to take place. Female ova are some of the largest cells in the body and are round in shape. The male sex cell is the whereas the female sex cell is the?
A non-fertilized egg may develop into a male.
Impacts of chilling temperatures on photosynthesis in warm-climate plants. Lee JT. Cold temperatures inhibited pollen germination and shortened pollen tubes in Trifolium repens and chickpea Jakobsen and Martens, ; Srinivasan et al. Temperature stress can sometimes have different effects on male and female structures, thereby creating asynchrony between male and female reproductive development Herrero, ; Hedhly et al.
In many cases, crop plants are now cultivated in new regions with different climatic fluctuations. If so, please let us know and your study could be featured here on our blog!