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 .

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

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Semen Astragali Complanati
Semen Armeniacae Amarum
Semen Cassiae
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Part one shape and structure of seed

• Shape , size , color , exterior texture and so on
  in different with different species.

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

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

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

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

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Transverse section of Semen Armeniacae Amarum
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• 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.

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1.Hilum 2. chalaza 3. raphe 4.micropyle 5.seed
coat 6. radicle 7. Plumule 8. cotyledon 9. embryo
axis
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• ?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
  ) .

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lichi
longan
Fructus Amoni
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• 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
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  Monocotyledoneae.

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• 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.

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1.Seedcoat 2.vascular bundle 3.putting wrong
tissue 4.endosperm
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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.

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

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