| Yellowing of disease? Or differentiating for adaptation? Study on Cinnamomum camphora ecotypes |
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| 作者姓名： | Shimizu HIDEYUKI |
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| 作者单位： | LI Qing,XU Ying(Shanghai Key Laboratory of Urbanization & Ecological Restoration,School of Life Science,East China Normal University,Shanghai 200062,P.R.China);ZOU Chun-jing(Shanghai Key Laboratory of Urbanization & Ecological Restoration,School of Life Science,East China Normal University,Shanghai 200062,P.R.China;National Institute for Environmental Studies,16-2Onogawa,Tsukuba,Ibaraki 305-8506,Japan);Shimizu HIDEYUKI(National Institute for Environmental Studies,16-2Onogawa,Tsukuba,Ibaraki 305-8506,Japan) |
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| 基金项目： | the National Nature Science Foundation of China (No. 30670315); the Global Environmental Research Fund of the Ministry of Environment of Japan |
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| 摘 要： | Cinnamomum camphora (L.) Presl is an evergreen broad-leaved tree of the Lauraceae family, widely distributed in the sub-tropical areas in the south of China and used as a virescent tree in urban gardens and streets in Shanghai for its beautiful shape and intensive stress-resistance. However, yellowing of C. camphora in recent years casts doubt about its significance. We believe the green-leaved and yellow-leaved C. camphora might be two different ecotypes, and tentatively refer to the green-leaved C. camphora as C. camphora f. viridis f. nov (CCV) and the yellow-leaved as C. camphora f. flavus f. nov (CCF). We studied their differences and arrived at the following conclusions: 1) compared with CCF, the area of lamina of CCV is significantly larger and the amount of chlorophyll (Chl) significantly higher; 2) the lamina and palisade tissues of CCV are significantly thicker than those of CCF, but its cuticle is significantly thinner; 3) the shape of the stomata of CCV is different from that of the CCF; the stomatal density and stomatal index of CCV are significantly lower than those of CCF. These results show that C. camphora might evolve adaptive differentiation in some aspects which can be used in virescence in urban streets and gardens.
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| 关 键 词： | 生态型 樟树 常绿阔叶树 犬冠状病毒 城市街道绿化 疾病 泛黄 气孔密度 |
| 收稿时间： | 18 March 2007 |
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