{"title":"Germination analysis in different substrates of Tabebuia cassinoides (Lam.) DC. of high restinga forest, Ubatuba, São Paulo, Brazil","authors":"Aline Paulichen, L. Vieira","doi":"10.21472/bjbs(2020)071604","DOIUrl":null,"url":null,"abstract":"Tabebuia cassinoides (Lam.) DC., popularly known as caixeta, is a well-known species for its timber harvesting. The species is dominant in flooded high restinga forest where we collected fruits and seeds from Núcleo Picinguaba, Serra do Mar State Park, Ubatuba, Brazil. The restinga, or sandy coastal forest, is a type of vegetation formed by sandy sediments from marine deposition. Thus, we asked whether the sand substrate would produce better germination indices than germitest paper or vermiculite due to its similarity to specie natural condition. We placed a total of 60 seeds in Gerboxes with duplicates of the three substrates. We placed each Gerbox with ten seeds randomly in the germination chamber at 30 °C, photoperiod of 12 h, and water at proper field capacity. We periodically evaluated the seeds and analyzed the germination percentage (%), germination speed index (GSI), and mean germination time (MGT). Our results showed that sand was the most favorable substrate for germination of caixeta seeds for at least 35 days, corroborating the initial hypothesis. We hope that our results can improve the sustainable management and conservation of the species.","PeriodicalId":9319,"journal":{"name":"Brazilian Journal of Biological Sciences","volume":"5 1","pages":"165-174"},"PeriodicalIF":0.0000,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Brazilian Journal of Biological Sciences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.21472/bjbs(2020)071604","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Tabebuia cassinoides (Lam.) DC., popularly known as caixeta, is a well-known species for its timber harvesting. The species is dominant in flooded high restinga forest where we collected fruits and seeds from Núcleo Picinguaba, Serra do Mar State Park, Ubatuba, Brazil. The restinga, or sandy coastal forest, is a type of vegetation formed by sandy sediments from marine deposition. Thus, we asked whether the sand substrate would produce better germination indices than germitest paper or vermiculite due to its similarity to specie natural condition. We placed a total of 60 seeds in Gerboxes with duplicates of the three substrates. We placed each Gerbox with ten seeds randomly in the germination chamber at 30 °C, photoperiod of 12 h, and water at proper field capacity. We periodically evaluated the seeds and analyzed the germination percentage (%), germination speed index (GSI), and mean germination time (MGT). Our results showed that sand was the most favorable substrate for germination of caixeta seeds for at least 35 days, corroborating the initial hypothesis. We hope that our results can improve the sustainable management and conservation of the species.
木薯属植物直流。通常被称为caixeta,是一种以伐木而闻名的物种。我们从巴西乌巴图巴的Serra do Mar州立公园Núcleo Picinguaba收集了果实和种子,该物种在洪水淹没的高休息林中占主导地位。海岸沙质森林是一种由海洋沉积的沙质沉积物形成的植被。因此,我们想知道,由于砂基质与种自然条件相似,是否会比试管纸或蛭石产生更好的发芽指数。我们将总共60颗种子放入gerbox中,gerbox中有3种底物的副本。我们将每个Gerbox随机放置10颗种子,在30°C、光周期12 h和适当的田间水量的萌发室中。我们定期对种子进行评估,并分析发芽率(%)、发芽速度指数(GSI)和平均发芽时间(MGT)。结果表明,沙子是最有利的草籽萌发基质,至少35天,证实了最初的假设。我们希望我们的研究结果能够促进该物种的可持续管理和保护。