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引用本文:王海宾,鲁静,刘贵华.顶芽、节数和埋藏深度对六种沉水植物断枝再生能力的影响.湖泊科学,2011,23(1):61-66. DOI:10.18307/2011.0110
WANG Haibin,LU Jing,LIU Guihua.Effects of apical tip, node number and burial depth on fragment regeneration of six submerged plants. J. Lake Sci.2011,23(1):61-66. DOI:10.18307/2011.0110
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顶芽、节数和埋藏深度对六种沉水植物断枝再生能力的影响
王海宾1,2, 鲁静1,2, 刘贵华1
1.中国科学院武汉植物园, 水生植物与流域生态重点实验室, 武汉 430074;2.中国科学院研究生院, 北京 100049
摘要:
研究了顶芽、节数和埋藏深度对穗花狐尾藻、黑藻、篦齿眼子菜、菹草、金鱼藻和轮藻等6种沉水植物断枝再生能力的影响.结果表明, 顶芽显著抑制了菹草的断枝再生能力, 但是对其它5种植物没有显著影响;随着节数增加, 断枝萌生再生枝和根的能力显著增强, 总体上, 5节以上的断枝具有明显更强的再生能力;穗花狐尾藻和6节以下的黑藻在埋藏条件下没有再生能力, 其它物种在1cm和2cm埋藏条件下仍具有较强的再生能力;6种沉水植物的断枝再生能力存在明显差异;同一物种的枝和不定根的再生能力也存在明显的不平衡, 金鱼藻和轮藻具有最强的萌生再生枝的能力, 然而两者在实验期间不能形成不定根。
关键词:  断枝繁殖  浅水湖泊  富营养化  生态恢复  沉水植物
DOI:10.18307/2011.0110
分类号:
基金项目:国家自然科学基金项目(30970469)和国家水体污染控制与治理科技重大专项项目(2008ZX07102-005)联合资助
Effects of apical tip, node number and burial depth on fragment regeneration of six submerged plants
WANG Haibin1,2, LU Jing1,2, LIU Guihua1
1.Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Acaaemy of Sciences, Wuhan 430074, P.R.China;2.Graduate University of Chinese Academy of Sciences, Beijing 100049, P.R.China
Abstract:
The effects of apical tip, node number and burial depth on regeneration abilities of vegetative fragments of six submerged plant species Myriophyllum spicatum, Hydrilla verticillata, Potamogeton pectinatus, P.crispus, Ceratophyllum demersum and Chara spp., were conducted.The results showed no significant changes occurred in the numbers of regenerated shoots and roots on fragments decapitated compared with the fragments with apices, except apical fragments of P.crspus had significanfly lower regeneration abilities.The increased numbers of nodes significantly enhanced the regeneration abilities of shoots and roots generally, and the fragments with above five nodes regenerated better than others.The fragment of M.spicatum and less than six-node of H.verticillata were able to regenerate new shoots and roots only at 0cm burial depth, while the other four species were able to regenerate new shoots and/or roots at depths of 1 cm and 2cm.Fragment regeneration abilities varied markedly both within and bctween the species.Both C.demersum and Chara spp.had the highest regeneration ability of shoots, but failed to regenerate roots.
Key words:  Fragment regeneration  shallow Lake  eutrophication  ecological restoration  submerged plants
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