Asexual Reproduction.ppt

1、Asexual Reproduction,World of Plants Standard Grade Biology,Asexual reproduction,Also known as vegetative propagation3 methods of vegetative propagtaion-tubers-bulbs-runners,Tubers,Tubers are underground food stores which stores food over the winter and provides a new plant with food until it can ma

2、ke its own.,Food made by the new plant is sent to make new tubers. Thereby reproducing itself.,Examples: potato, artichoke, yam, cassava, water chestnut, arrowroot,Taro- Japanese potato,Bulbs,E.g. daffodils, lilies,Runners,Runners are side shoots which grow out from the parent plant. Buds form at po

3、ints along the runner and eventually these buds form roots and grow into new plants.,Examples: spider plant (Anthericum), strawberry (Fragaria x ananassa),Artificial Propagation,2 methods used to cultivate plants asexually-taking cuttings-grafting,Cutting,They can be placed in moist soil or water (a

4、nd sometimes dipped in rooting powder).,Cuttings are small pieces of stem with some leaves attached, the new plant grows from this.,Grafting,A cut stem of one plant (with good flower or fruit growth) (the graft) is taken and firmly attached to the rootstock of another plant (which has a strong, esta

5、blished root system) (the stock). Examples- roses, fruit trees,Commercial aspects,Artificial propagation has allowed us to adapt and improve plants for our own use. Some of the benefits include:,Quick production of large numbers of genetically identical plants.,Specific varieties, desired features or consistent quality can be produced especially in fruit, flowers.,This powerpoint was kindly donated to http:/ is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.,