GAYANA BOTANICA最新文献_第5页

Effect of abiotic stresses on germination behaviour of Ruta chalepensis 非生物胁迫对冬青萌发行为的影响

IF 0.3 4区生物学

GAYANA BOTANICA Pub Date : 2021-01-01 DOI: 10.35513/botlit.2021.1.3

Aounia Hamdini, Z. Mehdadi, M. Dadach, A. Latrèche

{"title":"Effect of abiotic stresses on germination behaviour of Ruta chalepensis","authors":"Aounia Hamdini, Z. Mehdadi, M. Dadach, A. Latrèche","doi":"10.35513/botlit.2021.1.3","DOIUrl":"https://doi.org/10.35513/botlit.2021.1.3","url":null,"abstract":"This work aims to highlight the optimal temperature for the seed germination of Ruta chalepensis, an important threatened ethnomedicinal shrub, and assess its germination tolerance against salinity and water stresses as well. For this, the seeds were incubated firstly under different temperatures (5 to 30°C). After that, at 20°C, germination tests were performed under different sodium chloride (NaCl) concentrations (0 to 273.9 mM) and various polyethylene glycol solutions (PEG6000) (0 to -2.20 bar). Final germination percentage, velocity coefficient and latency time were subsequently the germination patterns determined and analysed. The optimum temperature for germination was 15°C, in which the maximum final germination percentage (85%) was noticed; germination fell steadily, however, above and below this temperature and completely ceased at 30°C. Germination behaviour of R. chalepensis seeds under osmotic stress conditions showed a significant effect of both NaCl and PEG6000. Germination decreased whether sodium chloride or polyethylene glycol was increased in the medium (p < 0.05). Moreover, the salinity tolerance threshold was 205.4 mM, equivalent to 16 g L-1 NaCl, while water stress was -1.16 bar, corresponding to 80 g L-1 PEG6000. Beyond these thresholds, germination stopped. Dropping in velocity coefficient and postponing in latency time with increasing both stresses were recorded either. The sensitivity of R. chalepensis seeds to environmental stresses should be taken into account for successful conservation programmes, which should be implemented by sowing seeds and planting seedlings in fresh habitats with sufficient annual rainfall.","PeriodicalId":55127,"journal":{"name":"GAYANA BOTANICA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79388289","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: 3

Comparison of physiological effects of osmotic stress on two wheat genotypes 渗透胁迫对两种小麦基因型生理效应的比较

IF 0.3 4区生物学

GAYANA BOTANICA Pub Date : 2021-01-01 DOI: 10.35513/botlit.2021.2.3

E. Kirova, I. Moskova, T. Kartseva, K. Kocheva

{"title":"Comparison of physiological effects of osmotic stress on two wheat genotypes","authors":"E. Kirova, I. Moskova, T. Kartseva, K. Kocheva","doi":"10.35513/botlit.2021.2.3","DOIUrl":"https://doi.org/10.35513/botlit.2021.2.3","url":null,"abstract":"Revealing stress tolerance mechanisms in plants would contribute to the selection of crop varieties with a higher capacity for surviving in unfavourable environments. In this regard, it is essential to identify possible physiological features that might be beneficial for increasing plant resistance to stress. Two contrasting common wheat (Triticum aestivum L.) cultivars with different drought tolerance were subjected to 48 h treatment with 20% polyethylene glycol 8000, which provoked an extra degree of osmotic and oxidative stress as well as distinct physiological responses. Better water retention capacity in leaves and lesser extent of membrane injury found in cultivar ‘Guinness’ compared to cultivar ‘Niki’ correlated with increased osmotic adjustment by accumulating higher amounts of proline and higher antioxidant scavenging capacity in the former. Compared to soluble sugars and total free amino acids, proline contributed to a greater extent to preserving leaf water. It was speculated that such a combination of features would set a genotypic advantage for this cultivar, which could also determine better performance under drought conditions in the field.","PeriodicalId":55127,"journal":{"name":"GAYANA BOTANICA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89140413","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: 1

Physiological responses of Pea plants to treatment with synthetic auxins and auxin-type herbicide 豌豆植物对合成生长素和生长素型除草剂处理的生理反应

IF 0.3 4区生物学

GAYANA BOTANICA Pub Date : 2021-01-01 DOI: 10.35513/botlit.2021.2.2

D. Todorova, I. Sergiev, Elena Shopova, L. Brankova, J. Jankauskienė, S. Jurkonienė, V. Gavelienė, R. Mockevičiūtė

{"title":"Physiological responses of Pea plants to treatment with synthetic auxins and auxin-type herbicide","authors":"D. Todorova, I. Sergiev, Elena Shopova, L. Brankova, J. Jankauskienė, S. Jurkonienė, V. Gavelienė, R. Mockevičiūtė","doi":"10.35513/botlit.2021.2.2","DOIUrl":"https://doi.org/10.35513/botlit.2021.2.2","url":null,"abstract":"The effect of exogenously applied 2,4-D (2,4-dichlorophenoxyacetic acid) on growth and antioxidant defence of pea plants, preliminary treated with two synthetic auxin compounds 1-[2-chloroethoxycarbonyl-methyl]-4-naphthalenesulfonic acid calcium salt (TA-12) and 1-[2-dimethylaminoethoxycarbonylmethyl]naphthalene chlormethylate (TA-14) was examined. All chemicals were applied by foliar spraying. Applied alone, TA-12 and TA-14 had no significant effects, but they modulated the 2,4-D induced changes on most investigated biochemical parameters. The shoot fresh weight reduction caused by 2,4-D was partially overcome by the use of TAs. The use of TAs partially overcame the shoot fresh weight reduction induced by 2,4-D. Apart from this, no significant changes were observed in the other biometric parameters. Treatment with 2,4-D did not enhance lipid peroxidation, and hydrogen peroxide content was slightly increased. These data indicate that treatment with 2,4-D did not cause severe oxidative stress, which is also confirmed by the results of the antioxidant defence system. The application of 2,4-D provoked mild accumulation of thiol-containing compounds, free proline and phenolic compounds and increased the antioxidant enzyme activities (GST, SOD, CAT, POD and GR) to a moderate degree. Pretreatment with TAs noticeably decreased the non-enzymatic antioxidants (free proline, total phenolics and total low-molecular thiols) compared to plants treated with 2,4-D only. Except for GR, TAs pretreatment returned the enzyme activities to levels close to the controls. Based on the results obtained, we suggest that the application of both synthetic auxins could modulate 2,4-D herbicide effects.","PeriodicalId":55127,"journal":{"name":"GAYANA BOTANICA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79653203","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: 2

Confirmed occurrence of the native plant species Eleocharis ovata (Cyperaceae) in Lithuania 立陶宛本土植物Eleocharis ovata (Cypera-ceae)的确认发生

IF 0.3 4区生物学

GAYANA BOTANICA Pub Date : 2021-01-01 DOI: 10.35513/botlit.2021.1.5

Z. Gudžinskas, Laurynas Taura

{"title":"Confirmed occurrence of the native plant species Eleocharis ovata (Cyperaceae) in Lithuania","authors":"Z. Gudžinskas, Laurynas Taura","doi":"10.35513/botlit.2021.1.5","DOIUrl":"https://doi.org/10.35513/botlit.2021.1.5","url":null,"abstract":"Information on the occurrence of Eleocharis ovata (Cyperaceae) in Lithuania for a long time had been based on misidentified specimens only. During the studies on the flora of South Lithuania in 2020, we discovered this species in Varėna district on the shores of Lake Pabezninkai. We performed field investigations on the distribution, size of population and habitats of E. ovata from August to October 2020 on the shores of Lake Pabezninkai and, searching for this species, surveyed potential habitats on the shores of eight other lakes in South Lithuania. A total of 63 individuals of E. ovata were found on the shores of Lake Pabezninkai, and they were widely dispersed on the northern and south-western shores of the lake. Most of the registered individuals of E. ovata were found growing on wet sand and mud in the communities of the Isoëto-Nanojuncetea class. Solitary individuals were also found in communities of the Phragmito-Magnocaricetea class. Assessment of E. ovata according to the IUCN criteria revealed that this species, currently occurring at a single locality in Lithuania, should be classified as critically endangered (CR). Conservation of E. ovata and other rare plant species recorded on the shores of Lake Pabezninkai should be organised by maintaining favourable habitat conditions.","PeriodicalId":55127,"journal":{"name":"GAYANA BOTANICA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90739434","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: 2

New alien taxa of the genus Cornus (Cornaceae) recorded in Lithuania and Latvia 立陶宛和拉脱维亚记录的山茱萸属外来新分类群

IF 0.3 4区生物学

GAYANA BOTANICA Pub Date : 2021-01-01 DOI: 10.35513/botlit.2021.2.6

Z. Gudžinskas, Lukas Petrulaitis

引用次数: 0

Notas sobre la variación de briófitas entre un bosque pantanoso de Amomyrtus luma y una pradera antropogénica húmeda de Juncus procerus 苔藓植物在Amomyrtus luma沼泽森林和Juncus procerus潮湿草原之间的变异注释

IF 0.3 4区生物学

GAYANA BOTANICA Pub Date : 2020-12-31 DOI: 10.4067/S0717-66432020000200168

Víctor Ardiles, Álvaro Promis, Daniela Cortés

引用次数: 0

Revisión de Heliotropium sects. Heliothamnus, Heliotrophytum, Hypsogenia, Plagiomeris y Platygine (Heliotropiaceae) en Chile 回顾Heliotropium教派。智利的Heliothamnus, Heliotrophytum, Hypsogenia, Plagiomeris和Platygine (Heliotropiaceae)

IF 0.3 4区生物学

GAYANA BOTANICA Pub Date : 2020-12-31 DOI: 10.4067/S0717-66432020000200115

F. Luebert

{"title":"Revisión de Heliotropium sects. Heliothamnus, Heliotrophytum, Hypsogenia, Plagiomeris y Platygine (Heliotropiaceae) en Chile","authors":"F. Luebert","doi":"10.4067/S0717-66432020000200115","DOIUrl":"https://doi.org/10.4067/S0717-66432020000200115","url":null,"abstract":"A taxonomic revision of the Chilean species of Heliotropium (Heliotropiaceae) is presented, excluding those of sect. Cochranea that were revised in a previous contribution. These species are Heliotropium amplexicaule (sect. Heliotrophytum), H. corymbosum (sect. Heliothamnus), H. curassavicum (sect. Platygyne), H. geissei (sect. Plagiomeris), H. microstachyum (sect. Hypsogenia), H. paronychioides (sect. Plagiomeris) and H. patagonicum (sect. Platygyne). I analyze in detail the nomenclature, iconography, taxonomy, systematics, distribution and bibliography of each species. Heliotropium corymbosum is newly reported for the flora of Chile and the new combination Heliotropium corymbosum var. grisellum is herewith proposed. This taxon is illustrated for the first time. I discuss the presence of two species of Heliotropiaceae erroneously reported for the Chilean flora: Heliotropium angiospermum (sect. Schobera) and Euploca procumbens. I conclude that the family Heliotropiaceae is represented in Chile only by the genus Heliotropium with 24 species, including 17 species previously treated under sect. Cochranea. I provide a key for the determination of all Chilean species of Heliotropium.","PeriodicalId":55127,"journal":{"name":"GAYANA BOTANICA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83591839","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: 1

Ripartites tricholoma (Alb. & Schwein.) P. Karst. (Basidiomycota, Agaricales) un nuevo registro de género y especie para Chile tricholoma (Alb。& Schwein。)p .岩溶。(担子菌门，蘑菇目)智利属和种的新记录

IF 0.3 4区生物学

GAYANA BOTANICA Pub Date : 2020-12-31 DOI: 10.4067/S0717-66432020000200186

M. J. Dibán, L. Hinojosa, Viviana Salazar-Vidal, G. Palfner

引用次数: 0

Reinterpretación del complejo Alstroemeria diluta Ehr. Bayer (Alstroemeriaceae) basada en el color y ornamentación de los tépalos, con cambio de distribución geográfica y de estatus de sus taxones 重新解释复杂的Alstroemeria diluta Ehr。拜耳(Alstroemeriaceae)基于花被的颜色和装饰，其分类群的地理分布和地位发生了变化

IF 0.3 4区生物学

GAYANA BOTANICA Pub Date : 2020-12-31 DOI: 10.4067/S0717-66432020000200176

M. Muñoz-Schick, Andrés Moreira-Muñoz

引用次数: 0

Historia biogeográfica de las briófitas de Chile 智利苔藓植物的生物地理历史

IF 0.3 4区生物学

GAYANA BOTANICA Pub Date : 2020-12-31 DOI: 10.4067/S0717-66432020000200073

Carolina Moraga

{"title":"Historia biogeográfica de las briófitas de Chile","authors":"Carolina Moraga","doi":"10.4067/S0717-66432020000200073","DOIUrl":"https://doi.org/10.4067/S0717-66432020000200073","url":null,"abstract":"Some biogeographical features of bryophytes associated with subtropical-temperate ecosystems in Chile are examined, including diversity, concentration of species richness, endemism, biogeographical composition and disjunctions. The historical-biogeographical interpretation of these characteristics considers the major evolutionary changes of the group in three different temporal scenarios, according to geological, paleobotanical and molecular evidences. First, simple- and complex-thalloids liverworts represented in Chile are examined, belonging to the Classes Haplomitriopsida and Marchantiopsida- Marchantiidae, archaic lineages linked to the pre-Cenozoic colonization of the Pangea mega-continent. Examples of simple-thalloids liverworts of Class Jungermanniopsida-Pelliidae, hornworts of the Class Anthocerotopsida and mosses of the Classes Bryopsida and Polytrichopsida illustrate the paleo-austral distribution patterns of bryophytes from the temperate region of Chile, related to the Gondwana breakup and expansion of Angiosperms during the Cretaceous/Paleogene. A second scenario, considers the final uplift of the Andes and the development of the Arid Diagonal of South America during the Neogene, processes that have played a major role in the biogeographical structure of the Chilean and South American floras. In this context, leafy liverworts associated with the relict forests of the Chilean semi- arid coast stand out, particularly epiphyllous liverworts of the two most diverse families of the Class Jungermanniopsida-Jungermanniidae, Lejeuneaceae and Plagiochilaceae, adapted to microclimates favored by coastal fogs. The last scenario discusses the significant role of the Pleistocene glacial cycles in the expansion of the sub-Antarctic temperate-cold element throughout central-southern Chile, and its effects on the concentration of bryophyte richness associated with Chile’s temperate-rain ecosystems.","PeriodicalId":55127,"journal":{"name":"GAYANA BOTANICA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82410222","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: 6