摘要
对广东东莞市荔枝叶片黄化的调查分析表明，荔枝叶片生长受阻，叶尖，叶边缘黄化主要是由于叶片含氟量过高所致．用氟化钠溶液对荔枝新梢进行喷雾试验，其受害症状与污染区调查的症状是一致的．在氟污染区，随着荔枝叶龄的增加，叶片中氟含量会显著提高，且叶片各部位的含氟量有由叶中脉向边缘增大的趋势．在含有一定浓度的氟化物培养基中荔枝花粉的萌发会受到抑制．大量积累在柱头上的氟化物既可对柱头造成伤害，又可直接影响落在柱头上的花粉的萌发，这可能是破坏受精作用的主要原因．
he cause which yellowed leaves of Litchi in Dongguan city was investigated. The result indicated that excessive fluoride content of Litchi yellowed leaves and hindered the development of leaves. Leaves of litchi sprayed with the solution of sodium fluoride showed similar ravaged symptom to that from the polluted areas. The fluoride content of the Litchi leaves which came from polluted areas could increase with the addition of foliar age.The fluoride content at each part on the injured leaf showed incremental trend from the middle vein to the edge of a leaf. The germination of Litchi pollen tube on the medium of fluoride could be inhibited. A large number of the fluoride accumulated in the stigma could damaged the stigma and affected the germination of Litchi pollen tube falling on the stigma,which may be the major cause which ravaged fertilziation.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
1998年第2期76-80,共5页
Journal of South China Agricultural University
关键词
荔枝
氟化物
营养生长
生殖生长
Litchi
fluoride
vegetative growth
reproductive growth
