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Section six The seed

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Section six The seed Seed is a characteristic reproductive organs of seed plant . The flower through pollination and fertilization , ovule in ovary developed seed . – PowerPoint PPT presentation

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Title: Section six The seed


1
Section six The seed
  • Seed is a characteristic reproductive organs of
    seed plant . The flower through pollination and
    fertilization , ovule in ovary developed seed .

2
  • For example
  • Semen Armeniacae Amarum(???) Semen Astragali
    Complanati(???) Semen Cassiae(???)and so on.

3
Semen Astragali Complanati
Semen Armeniacae Amarum
Semen Cassiae
4
Part one shape and structure of seed
  • Shape , size , color , exterior texture and so on
    in different with different species.

5
  • They have various form roundness (coconut),
    elliptical(gingko) , kidney-shaped(bean) ,
    heart-shaped(Semen Armeniacae Amarum) ,
    diamond(Semen Cassiae) and so on .

6
  • sizes large coconut , gingko and pinang . small
    seed of plantain , Gastrodia elata seed(????) and
    Bletilla striata seed(????).

7
  • colour mung bean and white haricot bean .
  • surface coarseness(coconut) , rumple(Semen
    Euphorbiae) , trichoma(Semen Strychni) etc.

8
gingko
plantain
pinang
Gastrodia elata
coconut
9
mung bean
soya
Vigna angularis
white haricot bean
jequirity
10
  • Structure seed coat
  • embryo
  • endosperm

11
Transverse section of Semen Armeniacae Amarum
12
  • 1.seed coat(integument)
  • ?hilum it is a round or elliptical scar falling
    from funicle or placenta of mature seed .
  • ?micropyle the reached part of radicle or of
    absorbed water when seed bourgeon.
  • ?chalaza meeting dot of vascular bundle in seed
    coat.
  • ?raphe ridgy line between hilum and chalaza.

13
1.Hilum 2. chalaza 3. raphe 4.micropyle 5.seed
coat 6. radicle 7. Plumule 8. cotyledon 9. embryo
axis
14
  • ?caruncle integument extend a spongy tuber ,
    absorbing water for helping bourgeon of seed .
    like castor-oil plant or croton.
  • ?aril funicle and tissue in placenta extend to
    form . For example, lichi(??) , longan(??)
    (succulent) and Fructus Amoni(??) ( membranaceous
    ) .

15
lichi
longan
Fructus Amoni
16
  • 2.embryo radicle will develop main root
  • embryo axis will develop the
    part
  • connecting root
    and stem
  • plumule will develop stem and
    leaf
  • cotyledonDicotyledoneae and

  • Monocotyledoneae.

17
  • 3.endosperm
  • It has white colour and locates around embryo .
    It has nourishment , starch , protein or fat etc.
  • Perisperm , it is a not entirely absorbing
    nourishment around embryo and endosperm in
    budding process of seed.

18
1.Seedcoat 2.vascular bundle 3.putting wrong
tissue 4.endosperm
19
Part two the type of seed
  • According endosperm have or not
  • ?Albuminous seed
  • Embryo is comparatively small , cotyledon is
    thin . Like wheat and rice etc.

20
1.hilum2.raphe3.chalaza4.caruncle5.seed
coat 6.cotyledon7.endosperm8. plumule9. embryo
axis10.radicle
21
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22
  • ?Exalbuminous seed
  • Cotyledon is freshy without endosperm . like
    soya , almond and seed of pumpkin.

23
1.Hilum 2. chalaza 3. raphe 4.micropyle 5.seed
coat 6. radicle 7. Plumule 8. cotyledon 9. embryo
axis
24
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25
  • Review Questions
  • ?.Definition
  • aril , hilum , micropyle, chalaza, raphe ,
    caruncle
  • ?.simple answer
  • 1.what is the composing of the embryo?
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