| 豇豆螺旋茎段维管组织观察及其成因分析 |
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| 引用本文： | 党江波,李彩,李晔,龙志坚,魏旭,汪卫星,何桥,郭启高,梁国鲁. 豇豆螺旋茎段维管组织观察及其成因分析[J]. 武汉植物学研究, 2011, 29(6): 743-748 |
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| 作者姓名： | 党江波 李彩 李晔 龙志坚 魏旭 汪卫星 何桥 郭启高 梁国鲁 |
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| 作者单位： | 西南大学园艺园林学院,重庆,400715 |
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| 摘 要： | 豇豆(Vigna unguiculata Linn.)的茎缠绕支持物形成右手螺旋,其茎段经水浸泡去表皮后可见维管纤维沿茎轴方向呈左手螺旋状排列.用徒手切片法观察螺旋型和直线型茎段各节间中部的横切面,发现二者木质部导管分子均由内至外呈对称的扇形排列；螺旋型茎段各节间扇形的角度均显著小于直线型茎段对应节间的扇形角度(p＜0.05)；除第1节间外,螺旋型茎段各节间扇形纵横比均显著大于直线型茎段对应节间的扇形纵横比(p＜0.05).分析表明,茎的两种螺旋之间存在扭力平衡；螺旋型与直线型茎段横切面导管分子扇形排列的差异可能是茎段扭转过程中受挤压所致.此外,茎段扭转并不是细胞横向不对称扩张的结果,而可能是由各侧细胞不均衡的纵向生长所造成.
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| 关 键 词： | 豇豆 维管纤维 缠绕 扭转 细胞伸长 |
Observation and Genesis Analysis of Vascular Tissue in Cowpea' s Helix Stem |
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| DANG Jiang-Bo , LI Cai , LI Ye , LONG Zhi-Jian , WEI Xu , WANG Wei-Xing , HE Qiao , GUO Qi-Gao , LIANG Guo-Lu. Observation and Genesis Analysis of Vascular Tissue in Cowpea' s Helix Stem[J]. Journal of Wuhan Botanical Research, 2011, 29(6): 743-748 |
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| Authors: | DANG Jiang-Bo LI Cai LI Ye LONG Zhi-Jian WEI Xu WANG Wei-Xing HE Qiao GUO Qi-Gao LIANG Guo-Lu |
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| Affiliation: | DANG Jiang-Bo,LI Cai,LI Ye,LONG Zhi-Jian,WEI Xu,WANG Wei-Xing,HE Qiao,GUO Qi-Gao,LIANG Guo-Lu*(College of Horticulture and Landscape Architecture,Southwest University,Chongqing 400715,China) |
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| Abstract: | Cowpea stems can be right-handed helical when twinning on backers.We found that vascular bundles in skinless stems,which had being soaked in water,ranked lengthways as left-handed helixes,opposite to the stems ' twinning direction.In addition,helix and line type stem internode vessel elements were arranged as sectors when observed in crosswise transection by hand-held slicing method,and the angles of these sectors in helix type stems were significantly less than those in the same internodes of line type ste... |
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| Keywords: | Cowpea(Vigna unguiculata Linn.) Vascular fiber Twinning Torsion Cell elongation |
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