Microsoft Power Point - LEAVES [Compatibility Mode]

8/3/2019 Microsoft Power Point - LEAVES [Compatibility Mode]

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LEAVESLEAVESLEAVESLEAVES

Primary photosynthetic organs ofPrimary photosynthetic organs ofPrimary photosynthetic organs ofPrimary photosynthetic organs of

plantsplantsplantsplantsMain site of transpirationMain site of transpirationMain site of transpirationMain site of transpiration

er ve r m ea pr m r a eer ve r m ea pr m r a eer ve r m ea pr m r a eer ve r m ea pr m r a eshoot apexshoot apexshoot apexshoot apex

Dorsiventrally flattenedDorsiventrally flattenedDorsiventrally flattenedDorsiventrally flattened


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Modified leaves

Protection

Spines

Succulent leaves


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Escobaria vivipara, pincushion cactus


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Modified leaves

Climbing

Tendrils

Capturing insects

arn vorous p ants Habitat for ants and mites

Domatia tiny homes

Bract


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Leaves of arid regions

Thick, leathery leaves; fewer stomata or sunken

stomata

-,

all

With dense, hairy coverings.


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Pine leaves

Sunken stomata

Thick cuticle

-

beneath the epidermis.


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Leaves of aquatic areas

Submerged leaves have considerably less xylem

and phloem, and the mesophyll, which is not

differentiated into s on and alisade la ers has

large air spaces.

Reproductive leaves


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Vegetative propagation by leaves

Kalanchoe pinnata


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Types of leaves of

carnivorous plants

Pitcher leaves

Pitcher plants (Darlingtonia, Nepenthes, and

Sarracenia)

Sundews (Drosera spp.)

Trap leaves

Venus fly trap (Dionaea muscipula)


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Nepenthes gracilis


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Nepenthes

merrilliana


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Drosera binata


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Dionaea muscipula


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Dionaea muscipula


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Leaf Type / PartsLeaf Type / PartsLeaf Type / PartsLeaf Type / Parts


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Leaf Type / Parts


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Leaf Attachment

petiolate sessile sheathing amplexicaul

petioleadnation

stem

perfoliatedecurrent

sheathnode


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Leaf Attachment


petioleadnation

stem

perfoliatedecurrent

sheathnode


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Leaf Attachment


petioleadnation

stem

perfoliatedecurrent

sheathnode


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Leaf Attachment


petioleadnation

stem

perfoliatedecurrent

sheathnode


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Leaf Attachment


petioleadnation

stem

perfoliatedecurrent

sheathnode


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Leaf Attachment


petioleadnation

stem

perfoliatedecurrent

sheathnode


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Leaf Attachment


petioleadnation

stem

perfoliatedecurrent

sheathnode


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Leaf Attachment


petioleadnation

stem

perfoliatedecurrent

sheathnode

Leaf Venation


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Leaf Venation

Leaf Venation


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Leaf Venation


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Leaf arrangement Alternate

Opposite

Whorled


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Leaf duration Deciduous

Leaves fall (or abscised) at the end of the growingseason.

Leafy throughout the year.

Marcescent

Fagaceae, leaves wither but do not fall off duringthe winter or dry season.


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Leaf shapes Ovate

Obovate

Elliptic

Oblong


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ReferencesReferencesReferencesReferencesMader, S. 2008. Biology 9Mader, S. 2008. Biology 9Mader, S. 2008. Biology 9Mader, S. 2008. Biology 9thththth edition.edition.edition.edition.

McGraw Hill Book Company, U.S.A.McGraw Hill Book Company, U.S.A.McGraw Hill Book Company, U.S.A.McGraw Hill Book Company, U.S.A.Simpson, M. 2006. Plant Systematics.Simpson, M. 2006. Plant Systematics.Simpson, M. 2006. Plant Systematics.Simpson, M. 2006. Plant Systematics.

Elsevier Press, USA.Elsevier Press, USA.Elsevier Press, USA.Elsevier Press, USA.

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Microsoft Power Point - LEAVES [Compatibility Mode]