Brazilian Journal of Plant Physiology最新文献_第8页

Ecophysiological adaptation and metal accumulation in water hyacinth from two tropical rivers 两条热带河流水葫芦的生态生理适应与金属积累

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000100006

A. P. Vitória, Frederico Lage-Pinto, Leonardo Bernardo Campaneli, M. G. Almeida, C. M. M. Souza, C. Rezende, R. Azevedo, J. G. Oliveira

{"title":"Ecophysiological adaptation and metal accumulation in water hyacinth from two tropical rivers","authors":"A. P. Vitória, Frederico Lage-Pinto, Leonardo Bernardo Campaneli, M. G. Almeida, C. M. M. Souza, C. Rezende, R. Azevedo, J. G. Oliveira","doi":"10.1590/S1677-04202010000100006","DOIUrl":"https://doi.org/10.1590/S1677-04202010000100006","url":null,"abstract":"The ecophysiological adaptations of water hyacinth (metal hyperaccumulator) under adverse environmental conditions are not yet clearly elucidated. This work evaluated photosynthetic pigments and chlorophyll a fluorescence in water hyacinth plants sampled in different regions (upper, middle and lower) of Paraiba do Sul river (PSR) and Imbe river, Brazil. Additionally Mn, Fe, Zn, Cu, Cr, Pb and Ni were quantified on the shoots and roots. Roots were the preferential site of metal accumulation. Cromium was not detected in the shoots. Iron and Mn were the elements detected in higher concentrations in all samples. Zinc and Cu were detected in higher concentrations in roots of plants from middle and upper PSR, sites of higher anthropogenic activity. The highest concentrations of almost all metals were verified in plants from middle PSR. Regarding photosynthetic adaptations, plants from middle and upper PSR showed the highest concentrations of photosynthetic pigments, as well as the highest values of Fv/Fm and Fv/F0. The photosynthetic performance of plants suggests that they are not under stress conditions, even in regions of higher anthropogenic activity. Positive correlation was observed among nonphotochemical quenching and carotenoids, suggesting dissipation of energy in the form of heat as an strategy to keep the stable photochemical photosynthesis functioning, confirmed by values of the Fv/Fm. It is possible that such adaptative strategy is efficient as a long term response to stress factors, once literature data suggest that this is not a preferential path for photosynthesis in stress circumstances under short time controlled conditions.","PeriodicalId":9278,"journal":{"name":"Brazilian Journal of Plant Physiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84318424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Chlorophyll fluorescence in rice: probing of senescence driven changes of PSII activity on rice varieties differing in grain yield capacity 水稻叶绿素荧光:探究PSII活性在不同产量水稻品种衰老驱动下的变化

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000100004

A. R. Falqueto, F. V. D. Silva, D. Cassol, A. M. Júnior, A. Oliveira, M. A. Bacarin

{"title":"Chlorophyll fluorescence in rice: probing of senescence driven changes of PSII activity on rice varieties differing in grain yield capacity","authors":"A. R. Falqueto, F. V. D. Silva, D. Cassol, A. M. Júnior, A. Oliveira, M. A. Bacarin","doi":"10.1590/S1677-04202010000100004","DOIUrl":"https://doi.org/10.1590/S1677-04202010000100004","url":null,"abstract":"With Japonica rice BRS Firmeza and indica rice BRS Pelota (low and high grain yield, respectively) as materials, Chl content and Chl a fluorescence parameters in flag leaves from the heading to mature grain stage were investigated. The Chl content and the Chl a fluorescence were measured using a portable chlorophyll meter CL-01 and portables fluorometer Handy-PEA and FMS-2 (Hansatech, Kings Lynn, UK), respectively. All measurements were taken on middle part of the flag leaves (n = 10). The results showed that the Chl content and Chl a fluorescence parameters declined after full expansion of flag leaves in both rice cultivars. However, these biochemical and photochemical parameters did not show similar changing pattern and the behavior of flag leaves senescence showed some differences between BRS Pelota and BRS Firmeza rice cultivars. During the senescence of flag leaves, BRS Pelota, the rice cultivar with higher grain yield capacity, was characterized by significant reductions in Chl content, PIABS,Total, TR0/ABS, ET0/ABS, ET0/TR0, RC/ABS compared to BRS Firmeza. On the other hand, DI0/RC, TR0/RC and ET0/RC were significantly higher in BRS Pelota. These results show that the decreased photosystem II activity, evaluated through chlorophyll fluorescence analysis, was resultant of leaves senescence process, which was much more expressive in BRS Pelota rice variety. We suggest that the higher productivity of BRS Pelota rice cultivar results from its higher assimilate mobilization ability or energy usage efficiency, in despite of its lower light absorption capacity.","PeriodicalId":9278,"journal":{"name":"Brazilian Journal of Plant Physiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84892637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 34

Monitoring the end of the in vitro phase of Anthurium andreanum Lindl. plantlets 红掌离体期结束的监测。植株

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000100007

G. Stancato, M. Tucci

{"title":"Monitoring the end of the in vitro phase of Anthurium andreanum Lindl. plantlets","authors":"G. Stancato, M. Tucci","doi":"10.1590/S1677-04202010000100007","DOIUrl":"https://doi.org/10.1590/S1677-04202010000100007","url":null,"abstract":"Estimulation of autotrophy in in vitro plantlets could be achieved through changes in the culture medium, or by changing the traditional hermetic caps by one that could allow gas exchanges between the culture and the environment. Besides that, the use of lamps with distinct emission spectrum irradiaction has propitiated successful results. This work was carried out aiming to evaluate the either the combined or the single action of some factors that can induce autotrophy on in vitro A. andraeanum cv. Eidibel plantlets. 3 sucrose concentrations were used: 0, 15 and 60 mM and for each one, to kinds of flasks according to the cap ventilation: under (0.038 L.h-1) and without ventilation. Flasks were kept under cold light fluorescent lamps or under gro-lux lamps. At the end of the experiment showing the highest shoot dry mass treatment was 60 mM, under ventilation and gro-lux, and the treatment which accumulate root dry mass to a lesser extent were 0 mM with ventilation and cold light and 15 mM without ventilation and cold light. In average, treatments with higher sucrose content in the culture medium, that is, 60 mM, under gro-lux lamps, presented the highest chlorophyll a, b and total contents, than those under cold lamp. Steps of carbohydrates metabolism could be associated with the total soluble sugars (sucrose and reducing sugars) levels, highlighting the steps where nutrient requirements were higher, showing the role of the plantlets sink.","PeriodicalId":9278,"journal":{"name":"Brazilian Journal of Plant Physiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88571405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Phytochemical and physiological changes in Ashwagandha (Withania somnifera Dunal) under soil moisture stress 土壤水分胁迫下Ashwagandha植物化学和生理变化

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000400005

Sonal Shah, R. Saravanan, N. Gajbhiye

{"title":"Phytochemical and physiological changes in Ashwagandha (Withania somnifera Dunal) under soil moisture stress","authors":"Sonal Shah, R. Saravanan, N. Gajbhiye","doi":"10.1590/S1677-04202010000400005","DOIUrl":"https://doi.org/10.1590/S1677-04202010000400005","url":null,"abstract":"Ashwagandha, commonly known as the Indian Ginseng (Withania somnifera) is an ingredient in many herbal preparations used for healing various ailments. It is cultivated in semi-arid regions of India as rain-fed crop. The response of this crop (cv. JA-134) to progressive soil moisture deficit on growth, physiology and content of phytochemicals was studied. At the end of treatment period, soil water potential (Ψw) decreased to -10.93, -1.15 MPa at 30 cm depth, predawn leaf water potentials were reduced to -0.62 and -0.51 MPa in the severe and moderate stress. Leaf area was reduced by 27.4% and 34.4% in moderate and severe water stress treatment compared to control. Chlorophyll content was reduced by 60% in the severe water stress. Changes in the steroidal alkaloids and lactones that are the major medicinal active principles derived from root extracts of this plant species was also analyzed. A reduction of 52.6% in net photosynthesis was noticed under severe stress. At the end of the treatment period, moderate and severe stress treatments had 0.751 and 0.714 mg g-1 12-deoxywithastramonolide (12-DWS) content in the roots respectively. The content of 12-DWS and withanolide were at 77% and 93% of the control in the moderate and severe stress, respectively, while yield of these compounds were at 65% and 78% of control in mild and severe stress. Thus, preferential partitioning of biomass in roots leads to higher root yield in moderate stress. Higher root yield partially offset the loss of bioactive compounds under soil moisture stress.","PeriodicalId":9278,"journal":{"name":"Brazilian Journal of Plant Physiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82756881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Adaptability and leaf anatomical features in oil palm seedlings produced by embryo rescue and pre-germinated seeds. 胚挽救和种子预发芽油棕幼苗的适应性及叶片解剖特征。

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000300008

Z. G. Luis, K. M. G. Bezerra, J. E. Scherwinski-Pereira

{"title":"Adaptability and leaf anatomical features in oil palm seedlings produced by embryo rescue and pre-germinated seeds.","authors":"Z. G. Luis, K. M. G. Bezerra, J. E. Scherwinski-Pereira","doi":"10.1590/S1677-04202010000300008","DOIUrl":"https://doi.org/10.1590/S1677-04202010000300008","url":null,"abstract":"Changes in the leaf structure of plants grown in different conditions have been reported, such as increase in size and density of stomata and reduction in stomatal control, amount of epicuticular wax, and mesophyll thickness, with a high diversity of intercellular spaces. However, these changes are highly variable depending on the physiological and morphological characteristics of each species. The objective of this work was to analyze the adaptability and anatomical plasticity of oil palm seedlings produced after embryo rescue and pre-germinated seeds. Expanded leaves were prepared for evaluation of morphometric data and anatomical structures. It was verified that the environmental conditions in vitro negatively influenced the stomata density, epidermal and hypodermal thickness, and the values for the expansion cells and leaf mesophile. Anatomically, the oil palm leaves present the same tissues composition in both growth conditions, with uniseriate epidermal cells, and tetracitic stomata occurring in both epidermal surfaces. Epidermal cells from in vitro plants are thinner than ones from greenhouse. The midrib of leaves from greenhouse plants are more developed and is composed by only one central vascular bundle, while plants from in vitro cultivation developed three to four collateral vascular bundles.","PeriodicalId":9278,"journal":{"name":"Brazilian Journal of Plant Physiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81865524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 27

Anti-oxidative and proteolytic activities and protein profile of laticifer cells of Cryptostegia grandiflora, Plumeria rubra and Euphorbia tirucalli 大花隐花、红蛋鸡和大戟乳汁细胞的抗氧化和蛋白水解活性及蛋白质谱

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000100002

C. D. Freitas, D. P. Souza, E. S. Araújo, M. G. Cavalheiro, Luciana de Siqueira Oliveira, M. Ramos

{"title":"Anti-oxidative and proteolytic activities and protein profile of laticifer cells of Cryptostegia grandiflora, Plumeria rubra and Euphorbia tirucalli","authors":"C. D. Freitas, D. P. Souza, E. S. Araújo, M. G. Cavalheiro, Luciana de Siqueira Oliveira, M. Ramos","doi":"10.1590/S1677-04202010000100002","DOIUrl":"https://doi.org/10.1590/S1677-04202010000100002","url":null,"abstract":"In this study, proteins extracted from laticifer cells of three plants were examined by electrophoresis, mass spectrometry (MALDI-TOF) and characterized in respect of proteolytic, chitinolytic and anti-oxidative activities by means of zymography and colorimetric assays. Acidic proteins with molecular masses between 12.5 and 74.5 kDa predominated in laticifers of P. rubra. This profile was not found in laticifers of C. grandiflora and E. tirucalli. The later was poor in respect of proteins. Strong anti-oxidative activity of superoxide dismutase (E.C. 1.15.1.1) was detected in P. rubra and C. grandiflora latices, and to a lesser extent ascorbate peroxidase (E.C. 1.11.1.1) and isoforms of peroxidase were seen. Catalase (E.C. 1.11.1.6) was detected only in laticifer cells of C. grandiflora. Chitinase (E.C. 3.2.1.14) was the sole activity found in laticifer cells of E. tirucalli, but was also detected in the other latices. The strong proteolytic activity of C. grandiflora was shown to be shared by at least three distinct cysteine proteinases (E.C. 3.4.22.16). Serine, aspartic and metaloproteinases were not detected. In laticifer cells of P. rubra, four proteinases were detected, including cysteine and serine types. This study reports new protein data of laticifers from plants that have been poorly investigated in this respect and contributes to the understanding of biochemical and functional aspects of laticifers in plants.","PeriodicalId":9278,"journal":{"name":"Brazilian Journal of Plant Physiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73129264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 43

Activation of phenylalanine ammonia lyase as a key component of the antioxidative system of salt-challenged maize leaves 苯丙氨酸解氨酶的激活是盐胁迫玉米叶片抗氧化系统的关键组成部分

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000400001

A. Gholizadeh, B. Kohnehrouz

引用次数: 42

24-epibrassinolide regulated diminution of Cr metal toxicity in Brassica juncea L. plants 表油菜素内酯调控芥菜Cr金属毒性的降低

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000300002

P. Arora, R. Bhardwaj, M. Kanwar

引用次数: 24

Glomus intraradices improved salt tolerance in Prosopis alba seedlings by improving water use efficiency and shoot water content 胞内球囊菌通过提高水分利用效率和茎部水分含量，提高了白豆幼苗的耐盐性

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000400008

A. Scambato, Mariela Echeverria, P. Sansberro, O. Ruiz, A. Menéndez

引用次数: 7

Phytotranslocation of Fe by biodiesel plant Jatropha curcas L. grown on iron rich wasteland soil 生物柴油植物麻疯树在富铁荒地土壤上对铁的转运

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000400003

S. V. Ghavri, R. Singh

{"title":"Phytotranslocation of Fe by biodiesel plant Jatropha curcas L. grown on iron rich wasteland soil","authors":"S. V. Ghavri, R. Singh","doi":"10.1590/S1677-04202010000400003","DOIUrl":"https://doi.org/10.1590/S1677-04202010000400003","url":null,"abstract":"Experiments were conducted to evaluate the plant tolerance to Fe and its phytotranslocation by Jatropha curcas L. from an iron rich wasteland soil. The soil was collected from wasteland soil (WLS) of a small town Sandila, (Hardoi, U.P.) India, and three Jatropha clones were cultivated in WLS amended or not with sand or cowdung in a ratio of 3:2. The WLS had high pH, elevated electric conductivity (EC) and was rich in organic carbon and total NPK. Iron and Mn were 2-3 folds higher than that in the normal field soil. Net root and shoot elongation as well as fresh and dry biomass of the plants were only slightly affected at 100 d in WLS as compared with that grown in non-polluted soil. Tolerance index (TI) of J. curcas was significantly higher in cowdung amended WLS in comparison to that in WLS, or WLS amended with sand. Translocation factor (TF) from the soil to plants for Fe was significantly higher in WLS than that in the normal field soil. Bio-concentration factor (BCF) and concentration index (CI) for Fe were 0.12 to 0.37, 1.0 to 6.2 respectively. The results indicate that Jatropha plantation is suitable for phytoremediation of Fe-contaminate wasteland soils, and also that these polluted fields could be used to cultivate this important biodiesel plant species.","PeriodicalId":9278,"journal":{"name":"Brazilian Journal of Plant Physiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83269985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22