SEEDS Ovule Structure chalaza raphe nucellus antipodal cells outer intergument polar nuclei inner intergument egg cell embryo sac micropyle synergid cell funiculus Pollination and Fertilisation pollen pollen tube antipodal cells 2 polar nuclei egg cell 2 synergid cells tube nucleus 2
Download ReportTranscript SEEDS Ovule Structure chalaza raphe nucellus antipodal cells outer intergument polar nuclei inner intergument egg cell embryo sac micropyle synergid cell funiculus Pollination and Fertilisation pollen pollen tube antipodal cells 2 polar nuclei egg cell 2 synergid cells tube nucleus 2
SEEDS Ovule Structure chalaza raphe nucellus antipodal cells outer intergument polar nuclei inner intergument egg cell embryo sac micropyle synergid cell funiculus Pollination and Fertilisation pollen pollen tube antipodal cells 2 polar nuclei egg cell 2 synergid cells tube nucleus 2 male gametes Double fertilization 1. Seed coat a. testa b. tegmen hilum funiculus micropyle raphe aril 2. Endosperm seed without endosperm seed with endosperm exalbuminous (non-endospermous) albuminous (endospermous) 3. Perisperm - originates from nucellus tissue 4. Embryo a. cotyledon / scutellum (in monocot) b. plumule c. radicle d. epicotyl e. hypocotyl f. coleoptyle (in monocot) g. coleorrhiza (in monocot) Types of seed germination: a. epigeal (in dicot) b. hypogeal (in monocot) Dicotyledonous seed (with endosperm) endosperm seed coat cotyledons shoot apex raphe caruncle radicle Rubber seeds Castor oil seeds Dicotyledonous seed (with endosperm) seed coat embryo cotyledon shoot apex radicle endosperm Chilli Chilli seeds Dicotyledonous seed (without endosperm) raphe cotyledon seed coat hilum micropyle radicle plumule Bean seeds Monocotyledonous seed (with endosperm) pericarp and fused seed coat coleoptile endosperm aleurone layer caryopsis coat first leaves shoot apex radicle scutellum (cotyledon) coleorhiza Maize seed Glumes Paddy seed Germination of dicotyledonous seed (epigeal) Epicotyl Germination of monocotyledonous seed (hypogeal)