Brazilian Journal of Botany
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Effect of salinity on seed germination and seedling growth of bullet cultivar of chilli (Capsicum annuum L.)
Brazilian Journal of Botany - Tập 46 - Trang 513-525 - 2023
Salinity stress is one of the most severe factors, limiting seed germination and post-germination events. Salinity produces negative effects on seed germination and seedling growth of most of the glycophytes either by inhibiting water absorption or by causing the toxicity of salt ions. Globally, sustainable salinization of arable land is rising at an alarming rate, reducing the output from formerl......
Spiral root hairs in Spiranthinae (Cranichideae: Orchidaceae)
Brazilian Journal of Botany - Tập 38 - Trang 411-415 - 2015
(Spiral Root Hairs in Spiranthinae (Cranichideae: Orchidaceae) Root hairs are extensions of root epidermal cells, usually unicellular and unbranched. Root hairs studies usually focus on the relevant physiological and molecular aspects and have become a well-studied model of cellular differentiation and growth. In the Orchidaceae structures such as velamen, as well as exodermal and endodermal thick......
Shading effect on survival, growth, and contents of secondary metabolites in micropropagated Anoectochilus plantlets
Brazilian Journal of Botany - Tập 40 - Trang 599-607 - 2017
Many Anoectochilus plants are now facing extinction; hence, they are propagated mainly from tissue culture. However, growth performance and secondary metabolites have not been fully identified on tissue-cultured plantlets from multiple Anoectochilus species under shading. In the present study, five Anoectochilus species [A. roxburghii (Wall.) Lindl., Fu_1; A. koshuaensis Hayata, Fu_2; A. formosanu......
Quantitative characteristics of the phases of winter dormancy of conifer species at a site in Central Siberia
Brazilian Journal of Botany - Tập 39 - Trang 1005-1014 - 2016
Traditionally the registration of seasonal changes in plant growth and development has been carried out phenologically, i.e., qualitatively using visual inspection. However, since the process of plant acclimatization to winter dormancy involves reversible biochemical and physiological changes at the level of cells, quantitative methods can be applied to determine the duration and the depth of wint......
Ecological assessment and suitability ranges of Ban oak (Quercus oblongata D. Don) in Chamba district, Himalayas: implications for present and future conservation
Brazilian Journal of Botany - Tập 46 - Trang 477-497 - 2023
Quercus oblongata D. Don is a multipurpose tree of ecological and economical importance. Continued overuse for forage and fuel purposes has resulted in the rapid decimation of its natural habitats. Therefore, the present study was undertaken to assess the population status, regeneration pattern, and habitat suitability model (in present and future) of Q. oblongata in the temperate forest ecosystem......
Influence of physical characteristics of environment (light and current velocity) on the substrate occupation by Spirogyra sp. in stream ecosystems
Brazilian Journal of Botany - Tập 37 - Trang 453-459 - 2014
Among the various factors that influence the distribution of macroalgae in stream ecosystems, physical environmental characteristics are those which promote faster changes in the structure and composition of these organisms. Using a study on the macroalgae Spirogyra sp. as an example, this work aimed to evaluate the influence of physical habitat characteristics (substrate size, shading, mesohabita......
Chromosome number evolution in dalbergioid legumes (Papilionoideae, Leguminosae)
Brazilian Journal of Botany - - 2020
The dalbergioids, one of the largest clades among legumes, present significant karyotype diversity. Previous studies suggested different base chromosome numbers, hampering the understanding of karyotype evolution in dalbergioid legumes. In this study, we integrated chromosome numbers from the literature with phylogenetic data and new cytogenetic data for six species aiming to clarify the paths of ......
Propagule resistance of an invasive Poaceae as a trait of its invasiveness
Brazilian Journal of Botany -
Putative priming effect of Seguieria langsdorffii Moq. leaf extract in Cucurbita pepo L. infected by zucchini yellow mosaic virus
Brazilian Journal of Botany - Tập 46 - Trang 15-25 - 2022
Cucurbita pepo L., an important crop in Brazil, can be infected by zucchini yellow mosaic virus (ZYMV), an aphid-transmitted Potyvirus. To avoid the use of insecticides, sustainable control could involve the application of leaf extracts (LE) with antiviral activity, particularly Caryophyllales species. However, the mode of action is unclear. This study aimed to evaluate the defense responses of C.......
Environmental control of seed dormancy and germination of Mimosa calodendron (Fabaceae): implications for ecological restoration of a highly threatened environment
Brazilian Journal of Botany - Tập 38 - Trang 395-399 - 2015
Rupestrian grasslands over ironstone outcrop, locally named canga, are montane ecosystems with restricted distribution known to harbor an unusually a large number of endemic plant species. These communities are highly threatened due to their high sensitivity to habitat conversions and extreme low resilience derived from anthropogenic pressure. Ecological restoration attempts on degraded rupestrian......
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