摘要
鸭跖草是黑龙江省大豆田危害最严重的杂草之一,并且随着叶龄的增大,其对除草剂的耐药性增强,防除更加困难。本试验利用细胞显微技术研究了不同叶龄鸭跖草叶片表皮及解剖结构特征。结果表明,不同叶龄鸭跖草叶片表皮特征及解剖结构存在差异。鸭跖草从2叶龄起,随着叶龄的增大,叶片上、下表皮气孔密度呈显著下降的趋势,上表皮凹陷气孔密度呈显著加大的趋势,下表皮凸出型气孔密度显著降低。1～2叶龄鸭跖草上表皮无非腺毛,从3叶龄起,叶片上表皮非腺毛的数目随叶龄的增大而增大。随叶龄的增大,叶片厚度,叶片上、下表皮厚度,栅栏组织及海绵组织厚度显著增大。10个栅栏组织细胞长度呈显著减小的趋势。栅栏组织排列由稀疏不规则向紧密规则的方向发展。
Dayflower is one of the important weeds in soybean fields in Heilongjiang. With the development of the plant, herbicide tolerance often increases. In this study paraffin section technique and light microscopy were used to investigate the foliar surface features and differences of dissection structure among dayflower at different leaf stages. The results showed that from 2 - 6 leaf stage, the stomatal density of upper and lower epidermis, protrudent stomata density in lower epidermis decreased with leaf stage, but sunken stomata density, the number of cilia, and the thickness of foliar,palisade tissue, spongy tissue ,upper epidermis, lower epidermis, and the length of 10 palisade tissue cell and compactness degree of palisade tissue increased with leaf stage.
出处
《作物杂志》
CAS
CSCD
北大核心
2008年第4期39-42,共4页
Crops
基金
国家教育部大豆生物学重点实验室项目(SD07D05)
关键词
鸭跖草
表皮特征
解剖结构
杂草
Dayflower
Foliar surface features
Leaf dissection structure
Weed
