摘要
有性繁殖体库对于植物种群的长存具有重要意义,迄今为止,泥炭地尚无苔藓植物长期的持久孢子库的直接实验证据。在长白山哈泥泥炭地,钻取50 cm表层泥炭样品,运用落叶松测年法推算泥炭地地层泥炭藓孢子的埋藏时间,经逐层提取和培养尖叶泥炭藓孢子,研究埋藏时间对孢子萌发率的影响。结果表明,随着埋藏时间的增加,尖叶泥炭藓孢子萌发率呈现对数函数递减的趋势。研究获得泥炭地苔藓植物具有长期的持久孢子库的实验证据,即埋藏112年的尖叶泥炭藓孢子仍具萌发潜力。据推算,泥炭藓孢子最大寿命可达396.4年。
Sexual propagule bank is of great importance for persistence of plant populations. To this day, no direct experiment proof of long-term persistent spore bank of bryophytes in peatlands was reported. In Hani Peatland of the Changbai Mountains, a 50 cm deep peat core was drilled and burial time of spores in peat layers was estimated by larch dating method. After the spores of Sphagnum capillifolium being extracted from the peat layer by layer, the spores were cultivated to investigate the effect of burial time on spore germination rate. The results showed that, with the increase of burial time, the germination rate of Sphagnum spores decreased exponentially. The results indicated that there was a long-term persistent spore bank in peatlands since spores of S. capillifolium still have the potential to germinate after 112 years of burial. According to our calculation, the maximum longevity in spores of S. capillifolium could be up to 396.4 years.
出处
《植物研究》
CAS
CSCD
北大核心
2013年第2期248-251,共4页
Bulletin of Botanical Research
基金
国家自然科学基金(长白山泥炭地藓类植物有性繁殖与更新对环境变化的响应(30700055)
长白山泥炭藓丰富度偏峰分布格局的植物相互作用调控机理(40971036)
