The Stem Develops from plumule SHOOT: portion bearing leaves Node, Internode, bud, flowers Types( on the length of life) 1.Annuals2.Biennials3.Perennials.

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Presentation transcript:

The Stem Develops from plumule SHOOT: portion bearing leaves Node, Internode, bud, flowers Types( on the length of life) 1.Annuals2.Biennials3.Perennials For one 2 seasonsMany years SeasonRadish, Turnipwoody plants Wheat, Rice Istudy.pk

Stem: types On the basis of size, habit, soft and woody HerbsShrubs Trees Colummar Unbranched, Crown of leaves At top. Palm Excurrent Branched, max girdth Tapering towards apex Polyalthia Deliquescent Divide and Redivide Mango

Stem: types Colummar Unbranched, Crown of leaves At top. Palm Excurrent Branched, max girdth Tapering towards apex Polyalthia Deliquescent Divide and Redivide Mango

Stem: types On the basis of size, habit, soft and woody Herbs Soft stem, small in size Radish, Mint, Mustard Shrubs Woody, bushy in nature, stem branched near ground Rose, Jasmine Trees Tall, woody, perennials. Mango, Peepal Colummar Unbranched, Crown of leaves At top. Palm Excurrent Branched, max girdth Tapering towards apex Polyalthia Deliquescent Divide and Redivide Mango

Stem: types On the basis of form and nature Herbacous Soft stem, small in size Radish, Mint, Mustard Herbacous Soft stem, small in size Radish, Mint, Mustard Woody hard Woody hard Fistular Internode hollow Bamboo Fistular Internode hollow Bamboo Jionted Swollen at internodes Grasses Jionted Swollen at internodes Grasses Succulent Thick and fleshy Opuntia Succulent Thick and fleshy Opuntia Spiny Acacia Spiny Acacia Naked At the apex Lateral Sides Lateral Sides Axillary Axil of a leaf Axillary Axil of a leaf Accessory More than one in axil central one is Accessory More than one in axil central one is Terminal At the apex Terminal At the apex Floral At the apex Leaf At the apex

Forms ReducedErectWeak Small green Radish Small green Radish Strong Unable to erect

Phyloclade and Cladodes Stem leaflike many nodes Single node cladodes (Asparagus) Phyloclade and Cladodes Stem leaflike many nodes Single node cladodes (Asparagus)