In this paper, a new foldable structure has been studied and designed drawing inspiration from the structure of a pollen grain of angiosperm. This structure is made by two materials: a more rigid upper part which works only in compression and a less rigid lower part which undergoes tensile ...
Clarke E, Steer MW (1983) Cytoplasmic structure of germinated and ungerminated pollen grains of Tradescantia virginiana . Caryologia 36:299–305Clark , E., Steer , M. W., 1983: Cytoplasmic structure of germinated and ungerminated pollen grains of Tradescantia paludosa. — Caryologia 36 : 299–...
Microtubules present in the sperm cell cytoplasm may be responsible for sperm cell motility.doi:10.1007/BF01247908Lynn L. HoefertSpringer-VerlagProtoplasmaLynn L. Hoefert. Fine structure of sperm cells in pollen grains ofBeta[J]. Protoplasma . 1969 (1-2)...
Clarke E, Steer MW (1983) Cytoplasmic structure of germinated and ungerminated pollen grains of Tradescantia virginiana . Caryologia 36:299–305Clark , E., Steer , M. W., 1983: Cytoplasmic structure of germinated and ungerminated pollen grains of Tradescantia paludosa. — Caryologia 36 : 299–...
In treated plants, numbers of pollen grains and also amount of fertile pollen grains were decreased in each anther significantly. Exine was not formed in some case of plants that treated by different acid solutions. Degradation of tapetum cells was take later in treated plants than control ones....
A comparative study on the allergenicity, structure, and ultrastructure of two Acacia pollen grains in guinea pigsPollen grainAllergenicityAcaciaOntogenyAbstractdoi:10.1007/s10453-012-9283-xSaeed IrianAhmad MajdAboozar HoseinizadehParisa JonubiAerobiologia...
SUMMARYThe exine of the S3S4genotype pollen grains ofO. organensisis furnished with beaded viscin threads as an efficient device for their transport by pollinating agents. The sexine structure is expedient for absorption of water and stigmatic exudate. The vegetative cell cytoplasm has the pertinent...
Pollen grainAllergenicityAcaciaOntogenyAcacia saligna and Acacia victoria are native to Australia brought to and grown in Southern Iran. They have since had a widespread distribution and become native in Iran. As people of the region are exposed to the pollen grains from these plants during a 5 ...
growing in the two regions has confirmed these data in that the microscopic observations were used to determine the ultrastructure of the anther, the shape and size of pollen grains which morphometric data (L/W) showed significant difference between the two populations. The microsporogenesis was ...
Also many vesicles released out from polluted pollen grains. SDS-PAGE showed that protein bands of polluted and non-polluted pollen grains are not different significantly, but in polluted pollen grains decrease protein content, as a result of air pollution that cause releasing of pollen proteins....