Plant sexual reproduction is influenced by fire frequency: evidence from a resprouting herb in Chaco ecosystems

IF 3.6 3区 生物学 Q1 PLANT SCIENCES Plant Biology Pub Date : 2025-03-17 DOI:10.1111/plb.70017
M. L. Tosatto, R. Aguilar, L. M. Carbone
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植物有性生殖受火灾频率的影响:来自查科生态系统中一种再生草本植物的证据。
火灾后不久,竞争的减少和非生物资源的增加有利于草本物种的生长和开花。这些变化也可能影响传粉者群落、繁殖成功,并可能影响后代的特征。然而,人为增加的火灾频率可能会逆转火灾的有益影响。研究了火灾频率对南美查科生态系统中雌雄同株再生草本植物棕榈茄(Solanum palinacanthum)性表达、授粉、雌性繁殖成功率和早期后代活力的影响。在6个地点进行了测量,沿着火灾频率的梯度,在22年中从0到5次火灾。研究发现,与未烧地相比,中等火灾频率(两次燃烧)地点的植株大小和雌雄同体花的比例均有所增加,但在高火灾频率地点均有所下降。在火灾频率中等的地区,传粉者对植物的访问也更为频繁。虽然火灾频率没有提高坐果的概率,但却增加了两次燃烧地点的果实总数。中频火源的种子质量和发芽率均较高。土壤资源和母源环境效应对灰棘棘的有性繁殖和早期后代活力起关键作用。然而,由于人类活动而增加的火灾频率可能会超过火灾对植物繁殖的有益影响。
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来源期刊
Plant Biology
Plant Biology 生物-植物科学
CiteScore
8.20
自引率
2.60%
发文量
109
审稿时长
3 months
期刊介绍: Plant Biology is an international journal of broad scope bringing together the different subdisciplines, such as physiology, molecular biology, cell biology, development, genetics, systematics, ecology, evolution, ecophysiology, plant-microbe interactions, and mycology. Plant Biology publishes original problem-oriented full-length research papers, short research papers, and review articles. Discussion of hot topics and provocative opinion articles are published under the heading Acute Views. From a multidisciplinary perspective, Plant Biology will provide a platform for publication, information and debate, encompassing all areas which fall within the scope of plant science.
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