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Plant Asexual Reproduction

Plant Asexual Reproduction - • annual plants grow flower...

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Plant Asexual Reproduction asexual reproduction  - results in genetically identical offspring self-pollination still generates genetic variability found in unchanging environments >> plant less likely to survive if environment suddenly changes o most asexual plants found in harsh environments vegetative reproduction - new plants cloned from parts of adults o runners - long stems growing along the soil surface, new shoot grows from each 2nd node o rhizomes - underground horizontal stems, new shoot can grow from each node o suckers - sprouts from roots that can become new plants o adventitious plantlets - reproductive leaves apomixes - seeds produced asexually from parent o requires seed dispersal plant tissue culture  - cloning plants from tissues w/ growth hormones cell wall removed >> protoplast (plant cell enclosed only by plasma membrane) protoplasts can fuse >> create hybrids (form of genetic engineering) cell wall can regenerate plant life span  - age dependent on species
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Unformatted text preview: • annual plants- grow, flower, form fruits/seeds within a growing season o includes most crop plants o almost entirely herbaceous (non-woody) o starves itself to death after flowering (senescence) • biennial plants- 2 year life cycles, only flowers once o stores photosynthate underground during 1st year o flowering stems produced in 2nd year using energy from underground storages o mostly harvested for roots (carrots, beets, cabbage) • perennial plants- herbaceous/woody, continues to grow yearly o majority of vascular plants o trees either deciduous (leaves fall once a year) or evergreen (plants never bare) • abscission- process by which leaves/petals are shed o gets rid of unproductive parts o takes place in abscission zone at base of petiole o protective layer filled w/ suberin (fat) on stem side of petiole o separation layer develops on leaf side of petiole >> weakened connections between stem/leaf...
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