PREMISE OF THE STUDY Interspecific reproductive barriers (IRBs) often prevent hybridization between closely related species in sympatry. In the tomato clade (Solanum section Lycopersicon), interspecific interactions between natural sympatric populations have not been evaluated previously. In this study, we assessed IRBs between members of the tomato clade from nine sympatric sites in Peru. ME...

Cellulose is an important component of cell wall, yet its location and function in pollen tubes remain speculative. In this paper, we studied the role of cellulose synthesis in pollen tube elongation in Pinus bungeana Zucc. by using the specific inhibitor, 2, 6-dichlorobenzonitrile (DCB). In the presence of DCB, the growth rate and morphology of pollen tubes were distinctly changed. The organiz...

This paper uses scanning electron microscopy (SEM) analyses and light (LM) to study pollen grains of species the family Oleaceae Hoffmanns. & Link distributed in Vietnam, including 23 belonging 6 genera (Oleaceae). Pollen all (Oleaceae) Vietnam are isopolar, radial, 3- prolate small size, with two types: subprolate type (Jasminum Olea) spheroidal (Jasminum, Fraxinus, Ligustrum, Osmanthus, C...

Pollen grains of Malvoideae (Malvaceae) which corbiculate bees cannot collect constitute a floral filter that excludes pollen-collecting bumble and honey from exploiting pollen resources. Although large, spiny are in fact harder to compact for collection by bees, morphology (e.g., grain diameter, spine length) is not itself reliable indicator collectability. In this study, we discovered two spe...