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23 paź 2024 · Nestedness in the resource-function matrix. In this work, we are particularly interested in the role played by both plant species (resources) and functions, as well as how they are intertwined in ...
11 cze 2004 · In this review, we (1) survey recent discoveries of pollen and stigma functions both before and after they make contact, and (2) address the great diversity in pollen and stigma structures across taxa, focusing on how they accomplish key tasks in pollination.
24 gru 2021 · Stigma is a part of the female reproductive structure of the flower. It comprises the pistil, a part of the gynoecium or female reproductive organ of a plant, together with two other structures, the style, and ovary. Stigma is a specially adapted portion of the pistil modified for pollen reception. Stigma Flower.
Pollen and stigma structure and function: the role of diversity in pollination. Plant Cell. 2004;16 Suppl (Suppl):S84-97. doi: 10.1105/tpc.015800. Epub 2004 Apr 9. Authors. Anna F Edlund 1 , Robert Swanson, Daphne Preuss. Affiliation.
28 cze 2008 · Summary. Siphonogamy, the delivery of nonmotile sperm to the egg via a pollen tube, was a key innovation that allowed flowering plants (angiosperms) to carry out sexual reproduction on land without the need for water. This process begins with a pollen grain (male gametophyte) alighting on and adhering to the stigma of a flower.
11 cze 2004 · There is no doubt that the pistil plays a key role in plant reproduction and that it has multiple functions: it can accept or reject the proper pollen, it sustains pollen tube growth, and it produces and protects the female gametophyte in the ovary.
In this review, we (a) discuss the hypotheses proposed for the adap-tive value of TSS, (b) examine the phylogenetic dis-tribution of TSS in angiosperms, and (c) investigate associations between TSS and plant reproductive traits that we predicted to be relevant to the evolution of the phenomenon.
