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2025-02-04 20:06本頁(yè)面
【正文】 values， seems， with new research suggesting they can recognize close relatives in order to work Dudley and Amanda File of McMaster University in Ontario， Canada， report they have demonstrated for the first time that plants can recognize their kin (親屬 )． Plants from the same species of wildflower grew aggressively alongside unrelated neighbors but were less petitive when they shared soil with their siblings (同胞 )， the study North American species， named sea rocket， showed more vigorous root growth when planted in pots with strangers than when raised with relatives of its addition to restraining root growth， such plants may also develop different stem lengths in the presence of siblings. This is an example of kin selection， a behavior mon in aninals in which closely related individuals take a group approach to succeeding in their environment， the researchers selection also applies to petition， the scientists added， because if family members pete less with each other， the group will do better overall. “ Everywhere you look， plants are growing right up next to other plants， ” Dudley said，pointing out that usually it’ s a case of each plant for itself.“ But sometimes those plants are related， and there are benefits to not wasting resources on being petitive.” How the plants determine which of their neighbors are siblings remains a mystery， Dudley and memory appear to be important for kin recognition in animals， but this isn’ t an option for plants， she researchers speculate (推測(cè) ) that plants municate through their roots， identifying themselves using tiny chemical signatures specific to each plant’ s family. The new study may have important implications (影響 ) for agriculture， Dudley added， since petition between plants can reduce crop yields. Planting more cooperative siblings together instead of strangers could theoretically mean better harvests. 5． What’ s the main idea of this passage? A． Plants can recognize and
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