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NTIS 바로가기Botanical gazette, v.135 no.4, 1974년, pp.306 - 313
Mooney, H. A. , Bartholomew, B.
Two species of Aesculus which grow in the summer-drought climate of California were investigated. Aesculus parryi, which is limited to Baja California where the drought period is of long duration, has a short productive period during the winter. This species has a high carbon allocation to roots and a reproductive system which is principally vegetative. Sexual reproduction takes place after leaf fall and hence totally at the expense of reserves. Numerous small seeds are produced per reproductive branch. In contrast, A. californica, which grows in a moister but cooler winter climate, has its productive period principally in the spring. This species has a proportionately low apportionment of carbon to roots and reproduces sexually. Each reproductive branch of this species normally produces a single massive seed after the tree has become leafless. The dissimilarities in the carbon apportionment and reproductive patterns between the two species can be related to the differences in their probability of successful seedling establishment and survival. In the A. parryi habitat the droughts are more frequent and of a longer duration than in the northern habitat of A. californica. The underground storage of reserves, vegetative reproduction, and the production of small, numerous seeds by A. parryi are the adaptive responses to its unpredictable environment.
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