Botany最新文献_第4页

Fruit anatomy and seedlings of the mistletoe Psittacanthus schiedeanus (Loranthaceae) 槲寄生的果实解剖和幼苗

IF 1.1 4区生物学

Botany Pub Date : 2023-09-07 DOI: 10.1139/cjb-2023-0031

J. Ornelas, S. Galicia, A. Vásquez-Aguilar, A. Vovides

引用次数: 0

Trends in groundberry cover under climate change in the southern and central Yukon, 1997 to 2022 1997年至2022年气候变化下育空地区南部和中部地莓覆盖的趋势

IF 1.1 4区生物学

Botany Pub Date : 2023-09-07 DOI: 10.1139/cjb-2023-0068

Charles Cjk Krebs, Rudy Boonstra, A. J. Kenney, Elizabeth J. Hofer, Thomas S. Jung, M. O’Donoghue

{"title":"Trends in groundberry cover under climate change in the southern and central Yukon, 1997 to 2022","authors":"Charles Cjk Krebs, Rudy Boonstra, A. J. Kenney, Elizabeth J. Hofer, Thomas S. Jung, M. O’Donoghue","doi":"10.1139/cjb-2023-0068","DOIUrl":"https://doi.org/10.1139/cjb-2023-0068","url":null,"abstract":"Groundberries are an important component of the flora of the boreal forest and provide seasonally important food for many birds and mammals, as well as local people in northern Canada. Here we ask if there has been a change in the cover of groundberries in the Yukon boreal forest over the last two decades. We monitored five common species at undisturbed forest sites spaced 300 km apart. At our Kluane site we monitored 710 fixed quadrats per year for 26 years (1997–2022), and at Mayo 500 quadrats per year for 18 years (2005–2022). The cover of four species, Arctostaphylos uva-ursi (bearberry), Arctostaphylos rubra (red bearberry), Empetrum nigrum (crowberry), and Geocaulon lividum (toadflax), declined annually by 0.2-0.8% at both sites. In contrast, Vaccinium vitis-idaea (lingonberry) increased annually by 0.5 and 0.8%. We tested if increases in summer temperature and rainfall were correlated with the observed changes but found no significant relationships. These boreal plants are changing in abundance, but we have limited data on the extent and speed of these changes. We recommend experiments to understand the cause(s) of these changes in groundberry productivity. Our study is a start in monitoring important berry species in this critical ecosystem of northern Canada.","PeriodicalId":9092,"journal":{"name":"Botany","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45024456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vertical botany: airborne remote sensing as an emerging tool for mistletoe research 垂直植物学:空中遥感作为槲寄生研究的新兴工具

IF 1.1 4区生物学

Botany Pub Date : 2023-08-29 DOI: 10.1139/cjb-2023-0049

Azim Missarov, Y. Sosnovsky, Karol Rydlo, O. Brovkina, W. Maes, Kamil Král, Martin Krůček, Y. Krasylenko

引用次数: 0

Contribution to the taxonomic elucidation of the Geonoma maxima complex (Arecaceae), in Central Amazonia, Brazil 对巴西中部亚马逊地区最大地杉复合体(槟榔科)的分类阐释贡献

IF 1.1 4区生物学

Botany Pub Date : 2023-08-25 DOI: 10.1139/cjb-2022-0130

Maria Cristina Souza, M. D. De Mendonça, M. Hopkins, F. Pinheiro, A. Salatino, Ana Cristina Brasileiro-Vidal, S. Vasconcelos, E. Ferreira

{"title":"Contribution to the taxonomic elucidation of the Geonoma maxima complex (Arecaceae), in Central Amazonia, Brazil","authors":"Maria Cristina Souza, M. D. De Mendonça, M. Hopkins, F. Pinheiro, A. Salatino, Ana Cristina Brasileiro-Vidal, S. Vasconcelos, E. Ferreira","doi":"10.1139/cjb-2022-0130","DOIUrl":"https://doi.org/10.1139/cjb-2022-0130","url":null,"abstract":"Geonoma maxima is an example of a species complex, among many others restricted to Neotropical rain forests, and which contribute to their high species diversity. Using environmental, morphological, karyological, and molecular data, we aim to test the taxonomic circumscription of three of the 11 G. maxima subspecies defined in the latest taxonomic treatment. We evaluated 217 samples of G. maxima complex from Ducke Reserve in the state of Amazonas, Brazil. Environmental preferences were significant at the of 0.1% level. Subsp maxima occurred in the slope, subsp chelidonura in the floodplain, and subsp spixiana in the plateau. Leaf morphology and height were different for each subspecies, but not leaf anatomy. The karyotypes of subspp chelidonura and maxima were symmetrical with 2n=28 chromosomes, 16 metacentric and 12 submetacentric. Molecular analysis revealed two groups, one comprised by subsp maxima and chelidonura, and the other formed exclusively by subsp spixiana. At Ducke Reserve, it is clear that the three subspecies are easily recognizable morphologically and ecologically, and it is likely that they do not interbreed locally. However, if these subspecies are analyzed on a larger geographic scale, it may not be possible to separate them.","PeriodicalId":9092,"journal":{"name":"Botany","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46196239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flowering phenology, floral biology, breeding system and pollination in the andromonoecious Commelina diffusa (Commelinaceae) 白花鸭跖草（鸭跖草科）雌雄同株的开花酚学、花生物学、繁殖系统和授粉

IF 1.1 4区生物学

Botany Pub Date : 2023-08-23 DOI: 10.1139/cjb-2022-0114

Veena V, S. Nampy

{"title":"Flowering phenology, floral biology, breeding system and pollination in the andromonoecious Commelina diffusa (Commelinaceae)","authors":"Veena V, S. Nampy","doi":"10.1139/cjb-2022-0114","DOIUrl":"https://doi.org/10.1139/cjb-2022-0114","url":null,"abstract":"Occurrence of male and bisexual flowers (andromonoecy) in a species is thought to be an adaptation to enhance reproductive success through increasing male function or by diverting resources otherwise used for the formation of pistils. Commelina diffusa Burm.f. is a pantropical, herbaceous, andromonoecious species from the family Commelinaceae. A typical inflorescence comprises male and bisexual flowers enclosed within a spathe. Morphology of the different floral types, floral phenology, pollen viability, pollen production and mating system were studied in this annual, bearing small fruits. Being nectarless, pollen is the only reward for the pollinators in this species. The number of fruits developing was found to influence the gender of the subsequent flowers within the spathe. The floral visitors, including members of Diptera and Hymenoptera facilitate outcrossing and may mediate geitonogamous selfing as well. Delayed selfing takes place when floral organs intertwine as the flower fades. Andromonoecy in itself does not promote outcrossing, but it may be advantageous to present pollen in more flowers thereby attracting and feeding more insects and potentially increase male function.","PeriodicalId":9092,"journal":{"name":"Botany","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41709475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Monthly dynamics of phenolic release and allelopathic effect in hollow- and hummock Sphagnum 空心和丘形泥鳅酚类物质释放及化感作用的月动态

IF 1.1 4区生物学

Botany Pub Date : 2023-08-18 DOI: 10.1139/cjb-2023-0058

Chao Liu, Yong-Da Chen, A. Mallik, V. Jassey, L. Rochefort, Z. Bu

{"title":"Monthly dynamics of phenolic release and allelopathic effect in hollow- and hummock Sphagnum","authors":"Chao Liu, Yong-Da Chen, A. Mallik, V. Jassey, L. Rochefort, Z. Bu","doi":"10.1139/cjb-2023-0058","DOIUrl":"https://doi.org/10.1139/cjb-2023-0058","url":null,"abstract":"Monthly variation in accumulation and release of phenolics in bryophytes and their allelopathic effects are little known despite their ecological significance. We conducted a field transplant experiment, to investigate Sphagnum growth and extracellular enzymes that modulate phenolic contents and release along water table level (WTL) gradient. Specifically, we assessed monthly changes in height increment, phenolic release and allelopathic effect during the growing season, as well as extracellular enzymes at the end of the experiment, for the two Sphagnum species: S. angustifolium, a hollow dwelling species, and S. magellanicum, a hummock species. Both Sphagnum species showed season- and WTL-dependent height increment and released phenolics. Sphagnum angustifolium exhibited negative allelopathy regardless of WTL, while S. magellanicum demonstrated mainly positive allelopathy at high WTL and negative allelopathy at low WTL. The degree of allelopathy was not contingent on phenolic release, but phenolic production was negatively correlated with height growth of the two species at their atypical habitats. Moreover, phenoloxidase or peroxidase did not show high activity at low WTL compared to high WTL. Our findings demonstrate for the first time that the strength and direction of allelopathy in Sphagnum may vary depending on the growing precipitation and temperature, WTL and inter- and intraspecific trait variability. Longer-term experiments may further elucidate the seasonal dynamics and mechanism of Sphagnum allelopathy.","PeriodicalId":9092,"journal":{"name":"Botany","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63989652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Leaf morphology and anatomy in Myrcia sect. Aulomyrcia (Myrtaceae): species circumscription and characterization of clades 桃金娘科桃金娘科桃金娘叶的形态与解剖:种的划分和枝的特征

IF 1.1 4区生物学

Botany Pub Date : 2023-08-16 DOI: 10.1139/cjb-2023-0038

Mariana A. Wagner, E. Lucas, P. Soffiatti, W. S. Cabral, Paulo Ricardo Portela, P. Fiaschi

{"title":"Leaf morphology and anatomy in Myrcia sect. Aulomyrcia (Myrtaceae): species circumscription and characterization of clades","authors":"Mariana A. Wagner, E. Lucas, P. Soffiatti, W. S. Cabral, Paulo Ricardo Portela, P. Fiaschi","doi":"10.1139/cjb-2023-0038","DOIUrl":"https://doi.org/10.1139/cjb-2023-0038","url":null,"abstract":"Myrcia, a diverse neotropical genus of Myrtaceae, encompasses 793 species. However, species of Myrcia are similar and difficult to distinguish. In Myrcia sect. Aulomyrcia, leaf features help distinguishing clades and species. Our aim is to provide leaf data for species of M. sect. Aulomyrcia’s clades F, and G. We sampled 31 specimens of 13 species of Myrcia sect. Aulomyrcia (Myrcia amazonica, M. eumecephylla, M. hexasticha, M. insularis, M. magna, M. micropetala, M. neodimorpha, M. neoestrellensis, M. obversa, M. pyrifolia, M. riodocensis, M. subobliqua, and M. tetraphylla). Samples were subjected to sectioning and staining techniques for morphological and anatomical analysis through stereo and light-microscopy. Leaf blade and petiole morphological and anatomical features were described carefully for the first time for these 13 species. We provided an identification key based on leaf features. Our findings are discussed in the light of Myrcia sect. Aulomyrcia systematics. We comment of the significance of petiolar and blade features, such as trichomes types and location, phyllotaxis, rhytidome peeling, periderm and lenticels, and petiole, blade, and vascular cylinder shape. Our study brings novel information on leaf structure variation in Myrcia sect. Aulomyrcia, delivering much needed data for species and clades circumscription and identification.","PeriodicalId":9092,"journal":{"name":"Botany","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42566766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Returning mistletoe to an urban forest: a restoration success story 让槲寄生重回城市森林:一个成功的恢复故事

IF 1.1 4区生物学

Botany Pub Date : 2023-08-11 DOI: 10.1139/cjb-2023-0069

D. Watson, Melinda E Cook, Rodney van de Ree, Lee J. Harrison

{"title":"Returning mistletoe to an urban forest: a restoration success story","authors":"D. Watson, Melinda E Cook, Rodney van de Ree, Lee J. Harrison","doi":"10.1139/cjb-2023-0069","DOIUrl":"https://doi.org/10.1139/cjb-2023-0069","url":null,"abstract":"Mistletoes have a fraught public relations history. Vilified as toxic tree-killing weeds, they have long been targeted for removal by arborists and forest managers concerned with tree health. Research on mistletoe ecology has revealed their positive influence on diversity and community structure via complex networks of interactions. In areas where mistletoe has traditionally been removed, managers are now asking whether they can return on their own or whether they should be reintroduced. To evaluate the practicalities of mistletoe restoration, we inoculated 28 London plane trees Platanus x acerfolia in inner Melbourne with Creeping Mistletoe Muellerina eucalyptoides, a locally rare species. Branch dimensions and aspect had no discernible effect on germination or seedling emergence, but trees where access to Brushtail Possums Trichosurus vulpecula was restricted were 30% more likely to host seedlings. Five years after inoculation, seven mistletoes successfully established on five trees, with two mistletoes bearing fruit. Communications with residents and city users elicited positive feedback, catalysing four additional inoculation trials in urban and forest settings elsewhere. In addition to representing a cost-effective means of enhancing habitat values, mistletoe restoration is useful for addressing questions about mistletoe ecology and educating the community about the functional roles these parasitic plants play.","PeriodicalId":9092,"journal":{"name":"Botany","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46605056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transgene silencing in the moss, Physcomitrella (Physcomitrium patens) 小立藓(Physcomitrium patens)转基因沉默的研究

IF 1.1 4区生物学

Botany Pub Date : 2023-08-02 DOI: 10.1139/cjb-2023-0042

S. Singer, N. Ashton

引用次数: 0

Supporting Communities in Humanitarian Crises with Acupuncture and Integrative Medicine A Perspective. 用针灸和中西医结合疗法支持人道主义危机中的社区透视。

IF 0.8 4区生物学

Botany Pub Date : 2023-08-01 Epub Date: 2023-08-14 DOI: 10.1089/acu.2023.0012

Sarah Budd

{"title":"Supporting Communities in Humanitarian Crises with Acupuncture and Integrative Medicine A Perspective.","authors":"Sarah Budd","doi":"10.1089/acu.2023.0012","DOIUrl":"10.1089/acu.2023.0012","url":null,"abstract":"<p><p>My background is in nursing, midwifery, and acupuncture. In November of 2021, I came across a blog post about volunteering as an acupuncturist in a rehabilitation clinic for migrant refugees and asylum seekers on the island of Lesvos. With experience in the National Acupuncture Detoxification Association (NADA) protocol and trauma training provided by Acupuncturists Without Borders, I decided to apply to the nongovernmental organization Earth Medicine rehabilitation clinic. I stayed for 2 weeks in January 2022, and went again in September 2022 for 2 weeks, but that time, I was based inside the camp. On returning home from my first trip, and while giving a talk about Lesvos to our regional group, a fellow acupuncturist suggested that we could do something closer to home. Thus, we set up a project in our city, Exeter, in the United Kingdom. Thanks to a willing team of volunteers, asylum seekers and refugees are offered free acupuncture treatments weekly on Saturday mornings. This takes place in a community center in a group setting, using the NADA ear protocol, as well as other acupuncture points and occasional full-body treatments when the circumstances allow this. Although the work on Lesvos was hard, it was also very rewarding. Working there has had a profound effect on me and I plan to go back. At our local project, we receive very positive feedback from the people who come to us. Using acupuncture to address post-traumatic stress disorder is very worthwhile, and I encourage others to consider doing the same.</p>","PeriodicalId":9092,"journal":{"name":"Botany","volume":"52 1","pages":"159-162"},"PeriodicalIF":0.8,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10620434/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86844006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0