在千奇百怪的植物大家庭中,有一类植物在开花时,花部会产生发热现象,其温度往往比周围气温高出20多摄氏度。它们就是具有佛焰苞的天南星科植物,例如半夏、马蹄莲、白菖蒲等等。佛焰花序为什么会发热?发热对它们又有什么好处呢? 原来,植物和人一样,热量是由呼吸作用释放出来的。科学家对此做了大量观测,他们发现,当天南星科植物的佛焰花序成熟时,花序的某些部分达到了惊人的呼吸水平,呼吸速率Qo_2,值超过了600,这是在高等植物中记录到的最高速率,可以和微生物的呼吸水平相媲美。这时组织中每小时吸收的O_2量高达它本身体积的100倍。这种呼吸是产热的,它放出的热量足以使佛焰花序的温度升高20℃,如果用手触摸花苞会感到非常温暖。例如,有一种产在英国的天南星科植物斑叶阿若母(Arum maculatum),它的外形漂亮极了,又被称为“杜鹃杯”、“领主与夫人”、“捷克上讲坛”。斑叶阿诺母佛焰花序的基部产生丛生的雌花,其上有雄花,不育的佛焰花序顶部扩展成几厘米长的棒状附 In the strange family of plants, there is a group of plants in the flowering, the Ministry will produce fever, the temperature is often higher than the surrounding temperature of more than 20 degrees Celsius. They are Araceae with spathes, such as Pinellia, calla, white calamus and so on. Why does the fire flame inflorescence fever? What is the benefit of fever again? Originally, plants and people, the heat is released by the respiration. Scientists have done a lot of observations, and they found that some parts of the inflorescences of Antarctica reached a breathtaking level of respiration when the fritillary flowering system matured, with a respiratory rate Qo_2 of over 600, which was recorded in higher plants To the highest rate, and the level of microbial breathing comparable. At this moment, the amount of O 2 absorbed by the tissue per hour is as much as 100 times of its own volume. This kind of breathing is hot, and it gives off sufficient heat to raise the temperature of the fritillary flame at 20 ° C. It feels very warm when touched by hand. For example, Arum maculatum, a species of Araceae produced in the United Kingdom, has a beautiful shape and is also known as the Cuckoo Cup, Lord and Madame, Czech Pulpit. The basal leaves of Arnica arborescens produce clusters of female flowers, with male flowers thereon, and the sterile cambium top extends into a few centimeter long rod-shaped attachment