论文部分内容阅读
通过对印度橡胶榕及落羽杉两种具有代表性树种的研究,发现氟经过叶部气孔进入叶片组织后,主要分布于下表皮的皮下层、海绵组织,很少分布于栅栏组织。在落羽杉叶片中、叶肉组织、树脂道也是氟分布的重要场所。 植物叶片中上述组织吸收氟后,不一定是积累性的,当这些组织没有出现急性中毒的况情下,氟可通过输导组织和维管束鞘薄壁细胞往下传。本试验通过对叶片(叶尖、中部、叶基)、叶柄等每天采自相同的部位;树皮每天采自不同的部位(距叶柄下1厘米、5厘米、10厘米等)分三天连续采样观察及测定,发现氟能够通过叶脉的韧皮部向树枝及树干的韧皮部纵向往下运输。
Through the study of two representative tree species of Ficus and Taxodium distichum in India, it was found that fluoride mainly distributed in the subepidermal layer and spongy tissue of the lower epidermis and rarely distributed in the palisade tissues. In the taxane leaves, leaf tissue, resin road is also an important place for fluoride distribution. Fluoride may not be cumulative in the leaves of plants following absorption of fluoride in these tissues. Fluoride may be transmitted through the parenchyma and bundle sheath parenchyma cells in the absence of acute poisoning of these tissues. In this experiment, the leaves were collected from the same sites every day for the leaves (leaf tips, middle leaves, leaf bases) and petioles. The bark was collected daily from different sites (1 cm, 5 cm, 10 cm below the petioles) for three days Sampling observation and measurement showed that fluorine could transport longitudinally down to the phloem of the branches and trunks through the phloem of veins.