Brazilian Journal of Plant Physiology最新文献_第7页

Challenges in proteome analyses of tropical plants 热带植物蛋白质组分析面临的挑战

Brazilian Journal of Plant Physiology Pub Date : 2011-01-01 DOI: 10.1590/S1677-04202011000200001

T. S. Balbuena, L. L. C. Dias, M. Martins, Tatiana Barroso Chiquieri, C. Santa‑Catarina, E. Floh, V. Silveira

引用次数: 20

Photosynthetic activity in the rootstock of hybrid peach trees submitted to water restriction and flooding 限水和淹水对杂交桃树砧木光合活性的影响

Brazilian Journal of Plant Physiology Pub Date : 2011-01-01 DOI: 10.1590/S1677-04202011000300007

E. G. Martinazzo, A. T. Perboni, M. Farias, V. Bianchi, M. A. Bacarin

引用次数: 17

Flowering and vegetative growth of olive tree submitted to pruning and paclobutrazol application 橄榄树在修剪和施用多效唑后开花和营养生长

Brazilian Journal of Plant Physiology Pub Date : 2011-01-01 DOI: 10.1590/S1677-04202011000200002

M. Cruz, A. F. Oliveira, D. L. D. Oliveira, J. V. Neto

引用次数: 4

Relationship between photochemical efficiency (JIP-Test Parameters) and portable chlorophyll meter readings in papaya plants 木瓜光化学效率(jip测试参数)与便携式叶绿素仪读数的关系

Brazilian Journal of Plant Physiology Pub Date : 2011-01-01 DOI: 10.1590/S1677-04202011000400007

F. Castro, E. Campostrini, A. T. Netto, L. H. Viana

{"title":"Relationship between photochemical efficiency (JIP-Test Parameters) and portable chlorophyll meter readings in papaya plants","authors":"F. Castro, E. Campostrini, A. T. Netto, L. H. Viana","doi":"10.1590/S1677-04202011000400007","DOIUrl":"https://doi.org/10.1590/S1677-04202011000400007","url":null,"abstract":"The Portable Chlorophyll Meter (PCM) is used to estimate the total chlorophyll and leaf nitrogen content of various species. Since there is a relationship between the chlorophyll concentration and the photochemical efficiency, a relationship can also be established between the PCM readings and some fluorescence variables to provide information on photosystem II (PSII) structure and activity. Papaya (Carica papaya L.) plants ['Sunrise Solo' (leaves with intense green coloring) and 'Golden' cultivars (leaves with yellow-green coloring) were grown in a greenhouse with 30% interception of photosynthetically active photon flux density. The plants were cultivated in 15L plastics pots. Ninety to 100 days after planting the older leaves turned yellow and the chlorophyll fluorescence variables and PCM readings were measured. At low PCM values (less than 30 to 'Sunrise Solo' and less than 20 to 'Golden') the PSII structure and activity were damaged, which is likely related to a reduction in the numbers of active reaction centers (RC/CS0). At higher PCM values the chlorophyll a fluorescence variables (ABS/RC, DI0/RC, TR0/CS0 e ET0/CS0) that are related to PSII structure and activity PSII were not responsive. These results indicated that the effects of chlorophyll content measured by PCM on the photochemical phase of photosynthesis evaluated by chlorophyll fluorescence occur after the degradation of chlorophyll molecules is initiated. In papaya the Portable Chlorophyll Meter (SPAD-502) was shown to be suitable for diagnosis of PSII energy distribution under N stress and senescence.","PeriodicalId":9278,"journal":{"name":"Brazilian Journal of Plant Physiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74939192","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: 18

Evaluation of hydration indexes in kale leaves 羽衣甘蓝叶片水化指标的评价

Brazilian Journal of Plant Physiology Pub Date : 2011-01-01 DOI: 10.1590/S1677-04202011000200006

A. G. Calbo, M. D. Ferreira

{"title":"Evaluation of hydration indexes in kale leaves","authors":"A. G. Calbo, M. D. Ferreira","doi":"10.1590/S1677-04202011000200006","DOIUrl":"https://doi.org/10.1590/S1677-04202011000200006","url":null,"abstract":"Hydration indexes are practical variables for quantifying plant water stress and can be useful for agronomic purposes. Three adapted hydration indexes based on relative water content, volumetric hydration, and leaf turgor pressure were evaluated in kale (Brassica oleracea var. acephala) leaf segments. Relative water content and volumetric hydration were measured in leaf segments after a water infiltration procedure with the aim of filling its large intercellular volumes (@18%v/v). The infiltration was done using a hydrostatic weighing procedure and with the aid of vacuum to fully hydrate the leaf segments. These two relative indexes were proportional to the transpiration-induced leaf water loss. The third index, turgor pressure, was measured with a Wiltmeter® instrument. Similarly, the turgor pressure was proportional to the leaf water loss, and it decreased from @310kPa in recently harvested leaves to zero in dehydrated leaves, after a total water loss of @23%. Turgor pressure was correlated with the other two hydration indexes using approximations of leaf volumetric elastic modules. Similar estimates were obtained because the decline between turgor pressure and the natural logarithm of these relative leaf hydration indexes was numerically similar (@900kPa). However, the volumetric hydration index seemed to be more suitable as a model, not only for being more concise but also because it showed a clearer biomechanical representation of the leaf water deficit effects.","PeriodicalId":9278,"journal":{"name":"Brazilian Journal of Plant Physiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83291631","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: 5

Antioxidant and other biochemical defense responses of Macrotyloma uniflorum (Lam.) Verdc. (Horse gram) induced by high temperature and salt stress 大叶草抗氧化及其他生化防御反应Verdc。(马革)由高温和盐胁迫引起

Brazilian Journal of Plant Physiology Pub Date : 2011-01-01 DOI: 10.1590/S1677-04202011000300002

Khalid Mohammed Naji, V. R. Devaraj

{"title":"Antioxidant and other biochemical defense responses of Macrotyloma uniflorum (Lam.) Verdc. (Horse gram) induced by high temperature and salt stress","authors":"Khalid Mohammed Naji, V. R. Devaraj","doi":"10.1590/S1677-04202011000300002","DOIUrl":"https://doi.org/10.1590/S1677-04202011000300002","url":null,"abstract":"High temperature and salinity are the major ecological factors challenging crop productivity in the arid and semiarid regions of the world. Effects of high temperature (43-45°C) and salt stress (0.6 M) on Macrotyloma uniflorum (Lam.) Verdc. (Horse gram), were evaluated in terms of antioxidants and antioxidant enzymes. Both treatments caused typical stress responses in this tropical leguminosae. Oxidative stress indicators such as H2O2, TBARS, and proline were significantly elevated. Similarly, the antioxidant enzymes superoxide dismutase (SOD; EC 1.15.1.1), guaiacol peroxidase (POX; EC 1.11.1.7) and acid phosphates (AP; EC 3.1.3.2) were significantly elevated while catalase (CAT; EC 1.11.1.6) was reduced. These treatments had contrasting effects on glutathione reductase (GR; EC1.6.4.2) and β-amylase (EC 3.2.1.1). While temperature stress caused increase in GR and decrease in β-amylase, salt stress caused a counter effect. Contrast was also observed in ascorbate and glutathione which increased in temperature stress and reduced in salt stress. SDS-PAGE analysis indicated entirely different protein profiles in temperature and salt stressed seedlings. Growth rate and fresh mass were affected to same extent, relative to their controls. Taken together these data describes the similarities and peculiarities of key biochemical responses of Horse gram to high temperatures and salinity.","PeriodicalId":9278,"journal":{"name":"Brazilian Journal of Plant Physiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82057331","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: 19

Nitric oxide induced alleviation of toxic effects of short term and long term Cd stress on growth, oxidative metabolism and Cd accumulation in Chickpea 一氧化氮诱导缓解短期和长期Cd胁迫对鹰嘴豆生长、氧化代谢和Cd积累的毒性作用

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000400007

A. Kumari, S. Sheokand, K. Swaraj

{"title":"Nitric oxide induced alleviation of toxic effects of short term and long term Cd stress on growth, oxidative metabolism and Cd accumulation in Chickpea","authors":"A. Kumari, S. Sheokand, K. Swaraj","doi":"10.1590/S1677-04202010000400007","DOIUrl":"https://doi.org/10.1590/S1677-04202010000400007","url":null,"abstract":"The present study investigates the effect of long and short term Cd stress in chickpea plants and evaluates the protective effect of exogenous nitric oxide (NO) supplementation using sodium nitroprusside (SNP). Cadmium treatments were given before sowing (long term stress) and thirty days after germination (short term stress). Sodium nitroprusside was given as foliar spray 30 days after germination to both long and short term Cd treated plants. Cadmium adversely affected the membranes as was evident from increased electrolyte leakage and lipid peroxidation levels. Sodium nitroprusside treatments decreased ion leakage and lipid peroxidation levels significantly. Short term Cd stress resulted in a higher induction of the catalase, peroxidase, ascorbate peroxidase, glutathione reductase and superoxide dismutase as compared to long term Cd stress. Nitric oxide showed its positive effect by further increasing the activities of antioxidant enzymes. Cadmium stress also altered the level of antioxidant metabolites by reducing the ascorbate redox ratio (ASC/DHA) and glutathione redox ratio (GSH/GSSG). Sodium nitroprusside treatments increased the redox ratios. Cadmium also adversely affected the seed yield and a greater decline was observed with long term Cd stress as compared to short term Cd stress. Nitric oxide had a positive effect on seed yield and Cd accumulation. The study concludes that an exogenous supply of NO protects chickpea plants from Cd toxicity.","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":"85694664","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: 58

Changes induced by Cu2+ and Cr6+ metal stress in polyamines, auxins, abscisic acid titers and antioxidative enzymes activities of radish seedlings Cu2+和Cr6+金属胁迫对萝卜幼苗多胺、生长素、脱落酸滴度和抗氧化酶活性的影响

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000400006

S. Choudhary, R. Bhardwaj, B. D. Gupta, P. Dutt, Rajinder K. Gupta, M. Kanwar, Pitamber Dutt

{"title":"Changes induced by Cu2+ and Cr6+ metal stress in polyamines, auxins, abscisic acid titers and antioxidative enzymes activities of radish seedlings","authors":"S. Choudhary, R. Bhardwaj, B. D. Gupta, P. Dutt, Rajinder K. Gupta, M. Kanwar, Pitamber Dutt","doi":"10.1590/S1677-04202010000400006","DOIUrl":"https://doi.org/10.1590/S1677-04202010000400006","url":null,"abstract":"The present study determined the effects of copper and chromium metals on the endogenous titers of polyamines, auxins, abscisic acid and antioxidative enzyme activities in Raphanus sativus L. cv. Pusa chetki seedlings. Among polyamines, putrescine and spermidine contents were enhanced by Cu2+ metal to 62.44 and 402.8 µg g-1 f.w. respectively over control. Spermine which was not observed in control was recorded in highest concentration (1287.9 µg g-1 f.w.) in Cu2+ metal stressed seedlings. On the other hand Cr6+ metal treated seedlings showed reduced contents of putrescine (1.43 µg g-1 f.w.), cadaverine (0.09 µg g-1 f.w.), spermidine (277.99 µg g-1 f.w.) and spermine (2.29 µg g-1 f.w.) when compared to control and Cu2+ metal treated seedlings. Significant decline in free and bound IAA concentration were found under Cu2+ and Cr6+ metal stress when compared to control. Naphthalene acetic acid not recorded in control seedlings was detected in seedlings treated with Cu2+ and Cr6+ metal. Activities of guaiacol peroxidase and catalase were reduced significantly under Cu2+ and Cr6+ metal stress in comparison to control. Superoxide dismutase activity enhanced significantly under Cr6+ rather than Cu2+ metal treatment. In addition the phytotoxicity of Cu2+ and Cr6+ metal on seedling growth was also determined. The data suggest that Cr6+ is more phytotoxic than exposure to Cu2+ metal.","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":"78060323","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: 20

Spatial and temporal variation of the nutrients in the sediment and leaves of two Brazilian mangrove species and their role in the retention of environmental heavy metals 两种巴西红树林沉积物和叶片中养分的时空变化及其在环境重金属滞留中的作用

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000300005

E. Bernini, Maria Amelia Bonfante da Silva, T.M.S do Carmo, G. Cuzzuol

{"title":"Spatial and temporal variation of the nutrients in the sediment and leaves of two Brazilian mangrove species and their role in the retention of environmental heavy metals","authors":"E. Bernini, Maria Amelia Bonfante da Silva, T.M.S do Carmo, G. Cuzzuol","doi":"10.1590/S1677-04202010000300005","DOIUrl":"https://doi.org/10.1590/S1677-04202010000300005","url":null,"abstract":"A variacao espacial e temporal das concentracoes de nutrientes das folhas e do sedimento entre as raizes de Laguncularia racemosa (L.) Gaertn. f. e Rhizophora mangle L. foi analisada no manguezal do estuario do Rio Sao Mateus, Espirito Santo, Brasil. No tecido foliar, os nutrientes seguiram a ordem: N > Ca > K > Mg > S > P > Fe > Mn > Zn > Cu, havendo diferenca significativa entre especies e sitios de estudo. Em geral, os teores de K foram mais elevados no periodo seco em relacao ao periodo chuvoso, para ambas as especies analisadas, enquanto que Ca e Cu exibiram maiores concentracoes no periodo chuvoso, para Laguncularia racemosa. No sedimento, os nutrientes seguiram a ordem: Mg > Ca > Fe > K > Mn > P > Zn > Cu, em geral, com menores concentracoes no sitio onde o sedimento foi mais arenoso. Registrou-se variacao significativa das concentracoes de nutrientes do sedimento entre os periodos analisados, mas o padrao sazonal nao foi claro para todos nutrientes. Concentracoes de nutrientes determinadas nas folhas de ambas as especies nao se correlacionaram com as concentracoes dos respectivos sedimentos. O fator de concentracao foi menor que 1,0 para Fe e entre 1,0 e 3,7 para Mn, Zn e Cu. Estes resultados fornecem evidencias fisiologicas sobre a relevância destas especies arboreas para o papel dos manguezais como barreira biogeoquimica ao trânsito de metais pesados.","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":"87859457","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: 25

Ameliorative effect of exogenous nitric oxide on oxidative metabolism in NaCl treated chickpea plants 外源一氧化氮对NaCl处理鹰嘴豆植株氧化代谢的改善作用

Brazilian Journal of Plant Physiology Pub Date : 2010-01-01 DOI: 10.1590/S1677-04202010000200002

S. Sheokand, V. Bhankar, V. Sawhney

{"title":"Ameliorative effect of exogenous nitric oxide on oxidative metabolism in NaCl treated chickpea plants","authors":"S. Sheokand, V. Bhankar, V. Sawhney","doi":"10.1590/S1677-04202010000200002","DOIUrl":"https://doi.org/10.1590/S1677-04202010000200002","url":null,"abstract":"Accumulation of salts in irrigated soils is one of the primary factors limiting yield in South Asia. We investigated whether exogenous nitric oxide (NO) supplementation as sodium nitroprusside has any ameliorating effect against NaCl induced oxidative damage in chickpea leaves. NaCl treatment (250 mM) alone and in combination with two concentrations of SNP (0.2 and 1 mM) were given to 50 days old chickpea plants for 2, 4 and 6 days. Salt stress adversely affected the relative membrane injury, lipid peroxidation levels, relative water content (RWC) and H2O2 content. The effect was time dependent. SNP treatments could ameliorate the toxic effect of short term salt stress of 2 days on relative membrane injury and partial amelioration was observed with 4 and 6 day stress treatment. A partial ameliorative effect of SNP was observed with lipid peroxidation levels, H2O2 content and RWC. Salt stress activated the antioxidant system by increasing the activities of SOD, POX, APX and DHAR. However no obvious change was observed in GR activity and CAT activity decreased under salt stress. Both the SNP treatments had a positive effect on antioxidant enzymes SOD, CAT, APX, GR and DHAR under salt stress. NaCl treatment resulted in a decline in the GSH/GSSG and ASC/DHA ratio. SNP treatments increased the reduced form of both the metabolites thus elevating the ratio of GSH/GSSG and ASC/DHA. This study concludes that exogenous application of NO protects chickpea leaves from NaCl induced oxidative 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":"75223648","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: 73