The pollen grain is severely dehydrated so that its mass is reduced enabling it to be more easily transported from flower to flower. When the pollen grain germinates, the intine grows out into a tube called pollen tube. Pollen tubes can reach great lengths, as in corn, where the corn silk consists… Enrich your vocabulary with the English Definition dictionary pollen tube - WordReference English dictionary, questions, discussion and forums. All Free. This Pollen tube grows into stigma towards the ovarian cavity. phytology, botany - the branch of biology that studies plants. Pollen-tube definitions A slender tube that is formed by a pollen grain of a seed plant and penetrates the ovule, where it releases the male gametes. See more. Looking for definition of pollen tube? the protoplasmic tube that is extruded from a germinating pollen grain and grows toward the ovule. The pollen tube is very important to mutual recognition and acceptance of pollen grain. Dictionary.com Unabridged Lexicographical Neighbors of Pollen Tube Definition of pollen tube in the AudioEnglish.org Dictionary. The generative cell will release the sperm nuclei, which travel down the pollen tube to reach the female reproductive portion of the flower. Copyright © HarperCollins Publishers. We Asked, You Answered. Noun. Q.28. The tube protrudes from a pore in the EXINE and grows down through the stigma, style and ovary of the CARPEL , entering the ovule usually by the micropyle. For instance, the subtilisin-like protease encoded by IDG002 was related to anther dehiscence [60]; the products of IDG008 were related to, A subset of the hand-pollinated flowers (ten self-pollinated and ten cross-pollinated) were collected 24 h after pollination and observed under an epifluorescence microscope to observe, Transformation of BcBCP1 gene into maize by three different, Response of in vitro pollen germination and, At the time of boll formation application of recommended dose of Boron must be applied at it improves the, Pollen was considered to have germinated if the, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, Comparative Biology of Cycad Pollen, Seed and Tissue--A Plant Conservation Perspective, Identification of Wheat Inflorescence Development-Related Genes Using a Comparative Transcriptomics Approach, Reproductive biology of endemic Solanum melissarum Bohs (Solanaceae) and updating of its current geographic distribution as the basis for its conservation in the Brazilian Cerrado/Biologia reprodutiva da endemica Solanum melissarum Bohs (Solanaceae) e atualizacao da distribuicao geografica atual, como base para a sua conservacao no Cerrado Brasileiro, Development of Plant Expression Vector with Taq DNA Polymerase Gene to Yield Heat-tolerant Maize Lines, Yield in almond is related more to the abundance of flowers than the relative number of flowers that set fruit, In vitro pollen viability of maize cultivars at different times of collection/ Viabilidade in vitro de polen de cultivares de milho em diferentes tempos de coleta, Relationship between Flower Opening in Six Cotton Cultivars and Their Progeny to Pollen Dehydration Tolerance, Method for overcoming the passion fruit self-incompatibility/Metodo para superacao da autoincompatibilidade do maracujazeiro, MANAGEMENT PRACTICE BOOST UP YIELD OF COTTON, IMPROVEMENT OF THE POLLEN QUALITY AND GERMINATION LEVELS IN GRAPES (VITIS VINIFERA L.) BY LEAF PULVERIZATIONS WITH NANOSIZE CALCITE AND SEAWEED EXTRACT (ASCOPHYLLIUM NODOSUM). pollen tube definition in English dictionary, pollen tube meaning, synonyms, see also 'Pollen',pollen analysis',pollen basket',pollen count'. Pollen tube. https://www.thefreedictionary.com/pollen+tube. Here we report imaging of cAMP distribution in living pollen tubes microinjected with the protein kinase A-derived fluorosensor. Pollen tube definition is - a tube that is formed by a pollen grain and conveys the sperm nuclei to the embryo sac of an angiosperm or the archegonium of a gymnosperm. The pollen tube penetrates the ovule and releases the male gametes. pollen tube: 1 n (botany) a slender tubular outgrowth from a pollen grain when deposited on the stigma for a flower; it penetrates the style and conveys the male gametes to the ovule Type of: plant part , plant structure any part of a plant or fungus All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. A hollow tube which develops from a pollen grain when deposited on the stigma of a flower. The pollen tube then passes through the style to reach the ovary and the ovule towards the female gamete / gametophyte / Ovum. Love words? Other articles where Pollen tube is discussed: angiosperm: Pollination: The pollen tube ultimately enters an ovule through the micropyle and penetrates one of the sterile cells on either side of the egg (synergids). Pollen germination has three stages; hydration, activation and pollen tube emergence. These synergids begin to degenerate immediately after pollination. Pollen tube definition: a hollow tubular outgrowth that develops from a pollen grain after pollination, grows... | Meaning, pronunciation, translations and examples The pollen grain germinates, which allows the pollen tube to form and work its way down the style of the plant to the ovule. Define pollen tube by Webster's Dictionary, WordNet Lexical Database, Dictionary of Computing, Legal Dictionary, Medical Dictionary, Dream Dictionary. New plants then can grow from the seeds. Each pollen grain is formed in the male structures of seed-bearing plants and is transported by various means to the female structures to facilitate fertilization of the ovules. The pollen-tube does not penetrate the ovule through the micropyle but enters at the opposite end—the chalaza. This pollen grain with the pollen tube and 3 nuclei is considered the mature gametophyte. A growth from a pollen grain down into the flower style which allows two sperm to pass, one to the ovum within the ovule, and the other to the central cell of the ovule to produce endosperm of SEEDS. Information about pollen tube in the AudioEnglish.org dictionary, synonyms and antonyms. What Is An Em Dash And How Do You Use It? Pollen refers to the powdery product synthesized by seed plants responsible for the production of the male gametes of the plant (shown below).. pollen tube a slender structure produced from a POLLEN GRAIN after POLLINATION.The tube protrudes from a pore in the EXINE and grows down through the stigma, style and ovary of the CARPEL, entering the ovule usually by the micropyle.See Fig. ‘Guidance of the pollen tube down the style involves mechanical, chemical and physical cues that are not yet fully understood.’ Pollen tube , a slender tube which issues from the pollen grain on its contact with the stigma, which it penetrates, thus conveying, it is supposed, the fecundating matter of the grain to the ovule. pollen tube explanation. In angiosperms, pollen is produced by the anthers at the end of stamens in flowers. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Pollen tube definition, the protoplasmic tube that is extruded from a germinating pollen grain and grows toward the ovule. Pollen tube growth and reorientation is a prerequisite for fertilization and seed formation. Proper usage and audio pronunciation (plus IPA phonetic transcription) of the word pollen tube. The slender tube formed by the pollen grain that penetrates an ovule after pollination and releases the male gametes. Both flowering plants and conifers (plants that grow seeds inside cones) make pollen. (Botany) a hollow tubular outgrowth that develops from a pollen grain after pollination, grows down the style to the ovule, and conveys male gametes to the egg cell. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. What is a pollen tube? 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