BIOL1401- Flowers

BIOL1401- Flowers - Chapter 8 Flowers, Fruits, and Seeds...

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Chapter 8 Flowers, Fruits, and Seeds
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Introduction Annual plants - Cycle completed in single season. Cycle = from seed germination to mature plant producing seeds  Biennial plants - Cycle completed in two growing seasons. Perennial plants - Cycle takes several to many growing seasons or plant produces flowers on new growth, while other plant parts persist indefinitely.
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Structure of Flowers Sepals - Outermost whorl Collectively referred to as  calyx Protects flower while in bud Petals - Next whorl inside sepals Collectively referred to as  corolla Showy corollas attract pollinators. Inconspicuous or missing corollas in many trees, weeds, grasses, and  wind-pollinated plants
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Structure of Flowers Stamens attached around base of pistil. Each stamen consists of  filament   with  anther  at top. Pollen grains  developed in anthers. Pistil consists of stigma , style , and ovary . Ovary develops into  fruit .
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Monocot flower Dicot flower
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Flower types Prefect flower :Flowers have both male and female reproductive structures Imperfect (unisexual) : Reproductive structure that is either functionally male or functionally female Complete : Perfect flower plus both petals and sepals. Incomplete : Missing either sepals and/or petels
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Ovary Position
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Fertilized ovule
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Structure of Flowers Flowers can be produced singly or in inflorescences. Inflorescence  - Group of  flowers Determinate and indeterminate  inflorescence
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Pollination is the process by which pollen is transferred stigma of the flowering plants, thereby enabling fertilization and sexual reproduction Abiotic pollination (wind , water and gravity) ,~20% Biotic pollination ,bee . .. ~ 80%
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This document was uploaded on 10/28/2011 for the course BIOL 1401 at Texas Tech.

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BIOL1401- Flowers - Chapter 8 Flowers, Fruits, and Seeds...

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