logging in or signing up Flower structure of onion chhabra61 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Copy Does not support media & animations WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 599 Category: Education License: All Rights Reserved Like it (3) Dislike it (0) Added: September 19, 2010 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Slide 1: FLORAL BIOLOGY OF ONION (Allium cepa L.) 2N=2X=16 Slide 2: Field View Seed Production Plot: Inflorescence (umbel) is present at the top of the green stem which is hollow from inside. The height may vary from 0.9m-1.2m depending upon genotype and other factors. Slide 3: Flowers in the umbel are enclosed in a membranous sheath called spathe. Inflorescence Membranous sheath Slide 4: The sheath is white-creamish in color. These are 2-3 in number. Inflorescence Close-up Membranous sheath Slide 5: The sheath splits because of the pressure created by growing flowers inside the umbel. Inflorescence Membranous sheath Flowers Slide 6: The sheath splits because of the pressure created by growing flowers inside the umbel. Inflorescence Close-up Membranous sheath: splitting Flowers Slide 7: There may be 50-2000 florets in an inflorescence. This depends upon genotype, time of planting and size and storage conditions of the mother bulb Inflorescence Close-up Membranous sheath Slide 8: Florets Close-up Perianth Slide 9: Florets Close-up 2 Perianth Slide 10: Florets Close-up Perianth Single floret Slide 11: Florets Close-up Single floret Slide 12: Florets Close-up Single floret Slide 13: Inflorescence Flowers are protandrous, so the crop is cross pollinated. The umbels are aggregates of cymes of 5-10 flowers each and the flowers open in a definite sequence. Anthers Slide 14: Anthesis Slide 15: Inflorescence Close-up The flowers are white to bluish in color. The perianth segments are 6 in 2 whorls spreading, reflexed, free and ovate. The stamens are also six in two whorls. Anthers (outer) Ovary Anthers (inner) Slide 16: Inflorescence Close-up Anthers are bi-locular and the ovary is superior. Stigma Slide 17: Floret TOP VIEW Anthers (outer) Ovary Anthers (inner) Ovary is superior and anthers are in two whorls, each having three stamens. Slide 18: Floret SIDE VIEW Ovary is superior and anthers are in two whorls, each having three stamens. Anthers (outer) Ovary Anthers (inner) Stigma Slide 19: Floret ANOTHER SIDE VIEW Ovary is superior and anthers are in two whorls, each having three stamens. Anthers (outer) Ovary Anthers (inner) Stigma Slide 20: Gynoecium Ovary Stigma Slide 21: Androecium Anthers may be of purple in color in some of the genotypes or their color changes with age of the flower also. Slide 22: Androecium Purple anthers Slide 23: Androecium Some florets have two ovaries with 7 stamens. Green anthers Two Stigmas Slide 24: Androecium Purple anthers Single Stigma Slide 25: Androecium 7 GREEN ANTHERS PURPLE ANTHERS Slide 26: Membranous Perianth Slide 27: Crop View at Seed Formation Stage Slide 28: Seed Formation Stage Slide 29: Seed Formation Stage Slide 30: Seed Formation Stage Slide 31: Seed Formation Stage Slide 32: Accessory Organs of Flower Slide 33: Seed Slide 34: T.S. Seed Slide 35: Mature Onion You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Flower structure of onion chhabra61 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Copy Does not support media & animations WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 599 Category: Education License: All Rights Reserved Like it (3) Dislike it (0) Added: September 19, 2010 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Slide 1: FLORAL BIOLOGY OF ONION (Allium cepa L.) 2N=2X=16 Slide 2: Field View Seed Production Plot: Inflorescence (umbel) is present at the top of the green stem which is hollow from inside. The height may vary from 0.9m-1.2m depending upon genotype and other factors. Slide 3: Flowers in the umbel are enclosed in a membranous sheath called spathe. Inflorescence Membranous sheath Slide 4: The sheath is white-creamish in color. These are 2-3 in number. Inflorescence Close-up Membranous sheath Slide 5: The sheath splits because of the pressure created by growing flowers inside the umbel. Inflorescence Membranous sheath Flowers Slide 6: The sheath splits because of the pressure created by growing flowers inside the umbel. Inflorescence Close-up Membranous sheath: splitting Flowers Slide 7: There may be 50-2000 florets in an inflorescence. This depends upon genotype, time of planting and size and storage conditions of the mother bulb Inflorescence Close-up Membranous sheath Slide 8: Florets Close-up Perianth Slide 9: Florets Close-up 2 Perianth Slide 10: Florets Close-up Perianth Single floret Slide 11: Florets Close-up Single floret Slide 12: Florets Close-up Single floret Slide 13: Inflorescence Flowers are protandrous, so the crop is cross pollinated. The umbels are aggregates of cymes of 5-10 flowers each and the flowers open in a definite sequence. Anthers Slide 14: Anthesis Slide 15: Inflorescence Close-up The flowers are white to bluish in color. The perianth segments are 6 in 2 whorls spreading, reflexed, free and ovate. The stamens are also six in two whorls. Anthers (outer) Ovary Anthers (inner) Slide 16: Inflorescence Close-up Anthers are bi-locular and the ovary is superior. Stigma Slide 17: Floret TOP VIEW Anthers (outer) Ovary Anthers (inner) Ovary is superior and anthers are in two whorls, each having three stamens. Slide 18: Floret SIDE VIEW Ovary is superior and anthers are in two whorls, each having three stamens. Anthers (outer) Ovary Anthers (inner) Stigma Slide 19: Floret ANOTHER SIDE VIEW Ovary is superior and anthers are in two whorls, each having three stamens. Anthers (outer) Ovary Anthers (inner) Stigma Slide 20: Gynoecium Ovary Stigma Slide 21: Androecium Anthers may be of purple in color in some of the genotypes or their color changes with age of the flower also. Slide 22: Androecium Purple anthers Slide 23: Androecium Some florets have two ovaries with 7 stamens. Green anthers Two Stigmas Slide 24: Androecium Purple anthers Single Stigma Slide 25: Androecium 7 GREEN ANTHERS PURPLE ANTHERS Slide 26: Membranous Perianth Slide 27: Crop View at Seed Formation Stage Slide 28: Seed Formation Stage Slide 29: Seed Formation Stage Slide 30: Seed Formation Stage Slide 31: Seed Formation Stage Slide 32: Accessory Organs of Flower Slide 33: Seed Slide 34: T.S. Seed Slide 35: Mature Onion