Primeiro relato da podridão da estipe da pupunheira, causada por Phytophthora palmivora, no estado do Paraná

Santos, Á. F. dos; Luz, Edna Dora Martins Newman; Finato, P. D.; Tessmann, Dauri José; Vida, João Batista

doi:10.1590/s0100-41582004000600016

Cited by 3 publications

(3 citation statements)

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“…Nos plantios do Estado de São Paulo, já foram encontradas as espécies F. subglutinas, F. moniliforme, F. solani, F. anthophilum e F. oxysporum (PIZZINATTO et al, 2001), produzindo clamidósporos como estrutura de resistência (BEDENDO, 1995). A espécie P. palmivora já foi relatada no Brasil, nos estados do Pará ), Pernambuco (TAVARES et al, 1998), São Paulo (PIZZINATTO et al, 2002), Tocantins (UESUGI et al, 2003), Paraná (SANTOS et al, 2003bSANTOS et al, 2004) e Costa Rica (ARROYO et al, 2004. A podridão da estipe da pupunheira provocada por Phytophthora palmivora (Butler) Butler ainda não constitui um problema limitante para o cultivo da pupunheira na Região Amazônica.…”

Section: Patógenos Radicularesunclassified

Etiologia e Manejo das Doenças da Pupunheira no Brasil

et al. 2010

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Resumo -A maioria dos problemas fitossanitários em pupunheira (Bactris gasipaes. var. gasipaes) é de ocorrência restrita a alguns plantios. Porém, com a expansão das áreas plantadas, a pressão das doenças aumenta, tanto nos viveiros de produção de mudas quanto em áreas de plantio comercial, potencializando o nível de danos causados pelas doenças. A antracnose (Colletotrichum gloeosporioides) é a enfermidade mais importante das pupunheiras no território brasileiro, mas outros patógenos como Phytophthora palmivora e Fusarium spp. vêm também ocorrendo em viveiros e em plantios. Outro problema que deve ser motivo de preocupação é a baixa qualidade sanitária das sementes utilizadas. Nesta revisão, são relatados os mais importantes resultados obtidos nas pesquisas fitopatológicas sobre a cultura, assim como os aspectos culturais mais relevantes. Discute-se a etiologia e as perspectivas para o manejo das principais doenças da pupunheira, com base em dados obtidos no Brasil e nos demais países onde a espécie é plantada.

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Section: Patógenos Radicularesunclassified

Etiologia e Manejo das Doenças da Pupunheira no Brasil

et al. 2010

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“…É notável, portanto, a importância da ampliação das pesquisas com essa espécie principalmente no que diz respeito à otimização das técnicas de cultivo das mesmas. Muitas são as áreas de pesquisa com essa espécie, abrangendo fisiologia OLIVEIRA et al, 2005), fitopatologia (PIZZINATTO et al, 2001;SANTOS et al, 2004), trato cultural (ALVES JR. et al, 2005) e propagação vegetativa in vitro (ARIAS, 1985;ARIAS;THORPE, 1992;STEINMACHER, 2005;STEINMACHER;CLEMENT;STEINMACHER et al, 2007). Avaliações sobre a presença e comportamento de microrganismos endofíticos e endosimbiontes de pupunheiras também têm sido avaliadas (COSTA NETO, 2002;MATTOS;FORTES, 2003;ALMEIDA, 2005;ALMEIDA et al, 2009) e tem sido de grande colaboração na tentativa para a resolução de tantos problemas apresentados na micropropagação dessa espécie.…”

Section: Importância Econômicaunclassified

“…Numerosas pesquisas vêm sendo realizadas com a espécie Bactris gasipaes Kunth. abrangendo fisiologia (OLIVEIRA et al, 2005), fitopatologia (PIZZINATTO et al, 2001;SANTOS et al, 2004), trato cultural (ALVES JR. et al, 2005) Em palmáceas, tem sido observado que níveis mais elevados da auxina ANA (ácido naftalenoacético) em relação à citocinina BAP (6-benzilaminopurina) favorecem consideravelmente o comprimento médio da parte aérea de ápices caulinares de pupunheiras (ALMEIDA, 1994), de embriões zigóticos maduros de açaizeiro (Euterpe oleracea Mart.) ) e de embriões zigóticos de coqueiro-anão (Cocos nucifera L.) cultivados em meio de enraizamento Y3 ) (LÉDO et al, 2007.…”

Section: Introductionunclassified

Avaliações morfofisiológicas do desenvolvimento de microplantas de pupunheiras submetidas a tratamentos com biorreguladores

Graner¹

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This study aimed to evaluate the role of bioregulators (NAA, BAP, TDZ and 2iP) on the morphogenetic development of pejibaye microplants. For this, every 28 days, the number of propagules, the root development, the length and the growth rate of shoots, the number of leaves, the oxidation, the number of meristematic centers in the explants basal region and in the leaf sheaths and/or in the propagules leaf primordia, the number of pro-embryogenic cell complex and the morphogenic routes and patterns were measured. All experiments were conducted in a randomized design. Qualitative data were presented as percentages and general averages, and quantitative data were subjected to polynomial regression or exponential analysis. The morphophysiological evaluations showed that the TDZ alone favored the development of adventitious buds, although short, and sometimes with thorns. Only in the treatments with the isolated presence of BAP, TDZ and 2iP, somatic embryos were not developed. For the other treatments there was an exponential behavior, in which the number of somatic embryos was reduced and varied according only to the cultivation period. Although a greater number of roots was observed in the treatment, in which NAA was associated with BAP, the control treatment has induced the highest rate of rooted explants and with greater root length, and has been the single one that produced branches. The isolated presence of TDZ promoted the greater shoot length, and its association with ANA promoted the highest growth rate. The best shoot development of pejibaye microplants and explants occurred in the MS bioregulator-free culture medium of or in the medium with NAA/TDZ association, at140 days of cultivation. Moreover, the isolated addition of the cytokinins BAP, TDZ and 2iP in the medium, later promoted the highest growth rate. In pejibaye explants the addition of 2iP alone promoted intense oxidation of the first developed leaves and the application of TDZ alone or associated with ANA promoted anomalies such as folding leaf and thorn development. The monitoring of the morphogenetic routes and patterns showed that in the treatments that were bioregulator-free, or with the isolated presence of NAA and TDZ, or the association of both, somatic embryos, from multicellular origin, raised up directly in the central region of the explants base. Pro-embryos from unicellular origin were also induced in the isolated presence of NAA or in NAA/BAP and NAA/TDZ associations. Moreover, in the isolated presence of TDZ, pro-embryos from multicellular origin were induced from shoot apical meristem activity and from the (bi) polarization of a large number of meristematic centers in the distal extremity of the explants base. Adventitious buds with multicellular origin from the proximal extremity of the explants base were induced more frequently in the bioregulator-free treatment and in the treatment with NAA/TDZ. Between the leaf explants primordia, adventitious buds were often induced by the treatments with the isolated presence of ANA.

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Inoculation methods, aggressiveness of isolates and resistance of peach palm progenies to Phytophthora palmivora

Fuzitani¹,

Santos

Damatto³

et al. 2018

Summa phytopathol.

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Stem base rot (SBR) caused by Phytophthora palmivora is the main disease affecting peach palm in the nursery and in the field. This study aimed to: a) determine the most appropriate method for P. palmivora inoculation in peach palm; b) assess the aggressiveness of P. palmivora isolates; c) evaluate the resistance of peach palm progenies to P. palmivora. Experiments were carried out at “Embrapa Florestas” from March 2011 to March 2012. A descriptive rating scale was developed to assess SBR severity in peach palm. The disease severity was evaluated 7, 14, 21 and 28 days after inoculation. The conclusions were: a) injection at the stem base was the most effective method for P. palmivora inoculation; b) SA-5, SA-9, SA-10, SA-11, SA-14, SA-15, SA-16, SA-30 and SA-31 were the most aggressive P. palmivora isolates; and c) peach palm progenies T2, T4, T7, T9 and T15 showed resistance to P. palmivora.

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Primeiro relato da podridão da estipe da pupunheira, causada por Phytophthora palmivora, no estado do Paraná

Cited by 3 publications

References 0 publications

Etiologia e Manejo das Doenças da Pupunheira no Brasil

Etiologia e Manejo das Doenças da Pupunheira no Brasil

Avaliações morfofisiológicas do desenvolvimento de microplantas de pupunheiras submetidas a tratamentos com biorreguladores

Inoculation methods, aggressiveness of isolates and resistance of peach palm progenies to Phytophthora palmivora

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