Pollen tube contents initiate ovule enlargement and enhance seed coat development without fertilization
نویسندگان
چکیده
منابع مشابه
Pollen tube contents initiate ovule enlargement and enhance seed coat development without fertilization
In angiosperms, pollen tubes carry two sperm cells toward the egg and central cells to complete double fertilization. In animals, not only sperm but also seminal plasma is required for proper fertilization. However, little is known regarding the function of pollen tube content (PTC), which is analogous to seminal plasma. We report that the PTC plays a vital role in the prefertilization state an...
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Ryushiro D. Kasahara, Michitaka Notaguchi, and Yujiro Honma PRESTO Kasahara Sakigake Project, Japan Science and Technology Agency (JST), Furo, Chikusa, Nagoya, Aichi, Japan; Institute of transformative bio-molecules, Nagoya University, Furo, Chikusa, Nagoya, Aichi, Japan; Graduate School of Science, Nagoya University, Furo, Chikusa, Nagoya, Aichi, Japan; PRESTO, JST, Furo, Chikusa, Nagoya, Aich...
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Genetic analyses, particularly in Arabidopsis, have led to the identification of mutants that define different steps of ovule ontogeny, pollen stigma interaction, pollen tube growth, and fertilization. Isolation of the genes defined by these mutations promises to lead to a molecular understanding of these processes. Mutants have also been obtained in which processes that are normally triggered ...
متن کاملPeptide signalling during the pollen tube journey and double fertilization.
Flowering seed plants (angiosperms) have evolved unique ways to protect their gametes from pathogen attack and from drying out. The female gametes (egg and central cell) are deeply embedded in the maternal tissues of the ovule inside the ovary, while the male gametes (sperm cells) are enclosed in the vegetative pollen tube cell. After germination of the pollen tube at the surface of papilla cel...
متن کاملA microsystem-based assay for studying pollen tube guidance in plant reproduction
We present a novel microsystem-based assay to assess and quantify pollen tube behavior in response to pistil tissues. During plant reproduction, signals from female tissues (pistils) guide the sperm-carrying pollen tube to the egg cell to achieve fertilization and initiate seed development. Existing pollen tube guidance bioassays are performed in an isotropically diffusive environment (for exam...
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ژورنال
عنوان ژورنال: Science Advances
سال: 2016
ISSN: 2375-2548
DOI: 10.1126/sciadv.1600554