Morphology of Flowering Plants
- It is a ripened ovule that contains an embryo is suspended animation, adequate reserve food for its future development and a covering for protection against mechanical injury, loss of water etc.
- A seed may have one/ Two coverings called seed coats. The outer or the only seed coat is called Testa. While the inner one is named as Tegmen.
- The surface of the seed possesses a fine pore called micropyle.
- There is a sear, called hilum, which is the place where funiculus (or) stalk of the seed is borne.
- The embryo consists of an axis/Tigellum to which are attached one or two cotyledons (or) seed leaves.
- Micropylar end of figellum bears radicle and the other end is plumule (or) embryonic bud.
- The part of embryo axis between the radicle and cotyledonary node is known as hypocotyl while the one between plumule and cotyledonary node is epicotyl.
- Food storing tissue of a seed is endosperm.
- Endospermic / albuminous seeds [eg . Most monocots, cereals, beens, coconut, rubber]
- Non - endospermic / Ex - albuminous seeds [Most dicot, orchids, sagittaria]
- In Nymphae, the food is stored in nucellus (or) perisperm and so is called as perispermic seed.
- In Bartholettia, hypocotyl is enlarged to store reserve food.
- Family Fabaceae [Papill onaceae] Eg : Lathyrus odoratus
- Family solanaceae Eg : Solanum nigursm
- Family Liliaceae Eg : Allium cepa
View this video for the topic from 0:11 to 7:43
View this video for the topic from 0:10 to 11:19
Disclaimer: Compete.etutor.co may from time to time provide links to third party Internet sites under their respective fair use policy and it may from time to time provide materials from such third parties on this website. These third party sites and any third party materials are provided for viewers convenience and for non-commercial educational purpose only. Compete does not operate or control in any respect any information, products or services available on these third party sites. Compete.etutor.co makes no representations whatsoever concerning the content of these sites and the fact that compete.etutor.co has provided a link to such sites is NOT an endorsement, authorization, sponsorship, or affiliation by compete.etutor.co with respect to such sites, its services, the products displayed, its owners, or its providers.