| 光照对蕨类植物配子体假根向重力性的影响 |
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| 引用本文： | 刘保东,孙国荣.光照对蕨类植物配子体假根向重力性的影响[J].武汉植物学研究,1994,12(2):165-169. |
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| 作者姓名： | 刘保东 孙国荣 |
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| 作者单位： | 哈尔滨师范大学生物系 |
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| 摘 要： | 对８种蕨类植物配子体假根向重力性反应的研究结果表明，除卷柏Ｓｅｌａｇｉｎｅｌｌａ ｔａｍａｒｉｓｃｉｎａ Ｓｐｒｉｎｇ配子体假根无向重力性反应并且其生长方向与光照方向无关外，其它７种的配子体假根均有向重力性反应，并且假根的向重力性反应在配子体发育初期，因光照的方向不同而异，表现为负向光性。随着配子体发育至片状体阶段，光对其向重力性反应的影响逐渐减弱，而重力的影响增强。在蕨类植物配子体发育初期，光对
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| 关 键 词： | 蕨类植物 假根 光 向重力性 |
| 收稿时间： | 1992-8-25 |
| 修稿时间： | 1993-2-9 |
EFFECT OF LIGHT ON GRAVITROPIC RESPONSE OF RHIZOIDS OF GAMETOPHYTES OF FERNS |
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| Liu Baodong,Sun Guorong.EFFECT OF LIGHT ON GRAVITROPIC RESPONSE OF RHIZOIDS OF GAMETOPHYTES OF FERNS[J].Journal of Wuhan Botanical Research,1994,12(2):165-169. |
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| Authors: | Liu Baodong Sun Guorong |
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| Institution: | Department of Biology, Harbin Normal University Harbin 150080 |
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| Abstract: | This paper concerns with the studies of gravitropic response of rhizoids of gametophytes 8 species ferns.The results indicate that,except the Selaginella tamariscina,the rhizoids of gametophytes of all the 7 species have gravitropic response at its initial stage,the gravitropic response of the rhizoids varies with the directions of light and shows negative phototropism.When the gametophytes get into platelet stage the effect of light on gravitropic response dicrease and gravity effect increase.Effect of light on gravitropic response of rhizoid is decided by whether the gametophyte have green assimilative tissue or not.Physiological mechanism of effect of light on gravitropic response of rhizoid and the abilities of gravitropic response of various fern rhizoids for plant systematical significance are discussed. |
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| Keywords: | Ferns Rhizoid Light Gravitropism |
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