Drogoudi P D, Ashmore M R
1 TH Huxley School of the Environment, Earth Sciences and Engineering, Imperial College of Science, Technology and Medicine, Silwood Park, Ascot, Berks SL5 7PY, UK.
New Phytol. 2000 Sep;147(3):561-569. doi: 10.1046/j.1469-8137.2000.00718.x.
Fruiting and deblossomed plants of strawberry (Fragaria×ananassa) were exposed to 92 ppb ozone or filtered air in open-top chambers for 69 d. Flower and fruit production, relative growth rate of leaf area, leaf gas exchange and plant biomass were investigated. Ozone caused an initial acceleration in inflorescence production, which was followed by a reduction in inflorescence production, fruit set, and, later, individual fruit weight, although total fruit yield was not affected before the end of the fumigation period. Ozone accelerated leaf senescence and had a greater negative effect on the rate of photosynthesis in older than in younger leaves in fruiting and deblossomed plants, but the response of net photosynthesis to ozone did not differ between the two groups of plants. Relative growth rate of leaf area was the first parameter to be reduced by ozone fumigation, with the effect being significant in fruiting, but not in deblossomed, plants. Final above-ground biomass was also significantly decreased by ozone in fruiting plants, but not in deblossomed plants. Root and crown biomass were not significantly affected by ozone fumigation in either fruiting or deblossomed plants.
将草莓（Fragaria×ananassa）的结果植株和去花植株置于开顶式气室中，分别暴露于92 ppb的臭氧或过滤空气中69天。对花和果实产量、叶面积相对生长速率、叶片气体交换和植株生物量进行了研究。臭氧导致花序产生初期加速，随后花序产生、坐果率降低，后期单果重下降，不过在熏蒸期结束前总果实产量未受影响。臭氧加速了叶片衰老，对结果植株和去花植株中老叶光合作用速率的负面影响大于幼叶，但两组植株净光合作用对臭氧的响应无差异。叶面积相对生长速率是受臭氧熏蒸影响而降低的首个参数，在结果植株中影响显著，而去花植株中不显著。臭氧使结果植株地上部最终生物量也显著降低，但对去花植株无显著影响。无论是结果植株还是去花植株，根和冠生物量均未受到臭氧熏蒸的显著影响。
