Cultivares de cana-de-açúcar submetido à restrição hídrica

Detalhes bibliográficos
Autor(a) principal: Santos, Ricardo Barbosa dos
Data de Publicação: 2011
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da UFS
Texto Completo: https://ri.ufs.br/handle/riufs/6548
Resumo: The increasing demand for biofuels has provided significant increases in the areas of sugar cane in Brazil and in recent decades,and long periods of drought have limited the production of this species. This study aimed to evaluate the performance of cultivars RB 85-5536 and RB 93-509 of cane sugar on water restriction during the first stages of development. Experiment was carried out in the greenhouse of the Department of Agronomic Engineering at UFS in randomized blocks in factorial2 x 4, two cultivars (RB 85-5536 and RB 93-509) and four levels of water in the soil based on predefined at field capacity (100% Cc, 80% Cc, 60% Cc and 40% Cc), with four replications, each replicate consisting of a plant. Were evaluated the initial fluorescence emission (F0), maximum fluorescence (Fm), the quantum yield of photosystem (Fv/Fm) and fluorescence transient OJIP, indices of photosynthetic pigments and proline contents determined in leaves determined +1. The measurements of emission of fluorescence were performed during the period of seven days every two days, from 10 to 12 am, with the aid of fluorometer (OS-30P) and clips fixed on the central portion of the leaf, the contents of pigments were determined in the same period with the aidofaportable chlorophyllmeter (Clorofilog CFL 1030) whereas the proline content in the end of the experiment. The fluorescence emission levels and rates of photosynthetic pigments decreased with the increase of water restriction in both cultivars. The cultivar RB 93-509 has accumulated higher proline contentat the level of stress 60% of Cc. With the increase of stress severe by water restriction occurs a reduction in total levels of chlorophyll fluorescence and photosynthetic pigment contents from the seventh day of stress in both varieties of sugar cane. The cultivar RB 93-509 presents greater sensitivity to water stress than the cultivar RB 85-5536.
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spelling Santos, Ricardo Barbosa doshttp://lattes.cnpq.br/5570543667939997Silva-Mann, Renatahttp://lattes.cnpq.br/45085850887756822017-10-02T12:49:17Z2017-10-02T12:49:17Z2011-02-23https://ri.ufs.br/handle/riufs/6548The increasing demand for biofuels has provided significant increases in the areas of sugar cane in Brazil and in recent decades,and long periods of drought have limited the production of this species. This study aimed to evaluate the performance of cultivars RB 85-5536 and RB 93-509 of cane sugar on water restriction during the first stages of development. Experiment was carried out in the greenhouse of the Department of Agronomic Engineering at UFS in randomized blocks in factorial2 x 4, two cultivars (RB 85-5536 and RB 93-509) and four levels of water in the soil based on predefined at field capacity (100% Cc, 80% Cc, 60% Cc and 40% Cc), with four replications, each replicate consisting of a plant. Were evaluated the initial fluorescence emission (F0), maximum fluorescence (Fm), the quantum yield of photosystem (Fv/Fm) and fluorescence transient OJIP, indices of photosynthetic pigments and proline contents determined in leaves determined +1. The measurements of emission of fluorescence were performed during the period of seven days every two days, from 10 to 12 am, with the aid of fluorometer (OS-30P) and clips fixed on the central portion of the leaf, the contents of pigments were determined in the same period with the aidofaportable chlorophyllmeter (Clorofilog CFL 1030) whereas the proline content in the end of the experiment. The fluorescence emission levels and rates of photosynthetic pigments decreased with the increase of water restriction in both cultivars. The cultivar RB 93-509 has accumulated higher proline contentat the level of stress 60% of Cc. With the increase of stress severe by water restriction occurs a reduction in total levels of chlorophyll fluorescence and photosynthetic pigment contents from the seventh day of stress in both varieties of sugar cane. The cultivar RB 93-509 presents greater sensitivity to water stress than the cultivar RB 85-5536.A crescente demanda por biocombustíveis tem proporcionado aumentos significativos das áreas de cana-de-açúcar no Brasil e nas últimas décadas os períodos prolongados de seca têm limitado a produção dessa espécie. Esse trabalho teve por objetivo avaliar o comportamento das cultivares RB 85-5536 e RB 93-509 de cana-deaçúcar quanto à restrição hídrica visando à seleção precoce. O experimento foi conduzido em casa de vegetação do Departamento de Engenharia Agronômica da UFS em delineamento experimental de blocos ao acaso em esquema fatorial 2 x 4, duas cultivares (RB 85- 5536 e RB 93-509) e quatros níveis de água no solo predefinidos com base na capacidade de campo (100% Cc, 80% Cc, 60% Cc e 40% Cc), com quatro repetições, sendo cada repetição constituída por uma planta. Foram avaliadas a emissão de fluorescência inicial (F0), fluorescência máxima (Fm), rendimento quântico do fotossistema (Fv/Fm) e fluorescência transiente OJIP,índices de pigmentos fotossintetizantes e teores de prolina determinados nas folhas +1. As medições da emissão de fluorescência foram realizadas durante o período de sete dias, a cada dois dias, entre 10 e 12 h da manhã, com auxílio de fluorímetro (OS-30P) e clipes fixados na porção mediana do limbo foliar, os índices de pigmentos foram determinados no mesmo período com auxílio de um medidor portátil de clorofila (Clorofilog CFL 1030) enquanto que o teor de prolina no final do experimento.Os níveis de emissão de fluorescência e os índices de pigmentos fotossintéticos reduziram com o aumento da restrição hídrica em ambas cultivar. A cultivar RB 93-509 acumulou maior teor de prolina ao nível de estresse de 60% da Cc. Com o aumento do estresse severo de restrição hídrica ocorre redução total nos níveis de fluorescência da clorofila e índices de pigmentos fotossintéticos ao sétimo dia de estresse em ambas cultivar de cana-de-açúcar. A cultivar RB 93-509 apresenta maior sensibilidade ao estresse hídrico que a cultivar RB 85-5536.Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorapplication/pdfporUniversidade Federal de SergipePós-Graduação em AgroecossistemasUFSBRProlinaEstresse hídricoFluorescência da clorofilaProlineWater stressChlorophyll fluorescenceCNPQ::CIENCIAS AGRARIAS::AGRONOMIACultivares de cana-de-açúcar submetido à restrição hídricaCULTIVARS OF SUGAR CANE SUBMITTED TO WATER RESTRICTION.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSinstname:Universidade Federal de Sergipe (UFS)instacron:UFSORIGINALRICARDO_BARBOSA_SANTOS.pdfapplication/pdf2083261https://ri.ufs.br/jspui/bitstream/riufs/6548/1/RICARDO_BARBOSA_SANTOS.pdfe0d9f97217d4370c6ccc06e91f855254MD51TEXTRICARDO_BARBOSA_SANTOS.pdf.txtRICARDO_BARBOSA_SANTOS.pdf.txtExtracted texttext/plain148436https://ri.ufs.br/jspui/bitstream/riufs/6548/2/RICARDO_BARBOSA_SANTOS.pdf.txt410ea1a5975cea19693d88bc8eb9d6abMD52THUMBNAILRICARDO_BARBOSA_SANTOS.pdf.jpgRICARDO_BARBOSA_SANTOS.pdf.jpgGenerated Thumbnailimage/jpeg1299https://ri.ufs.br/jspui/bitstream/riufs/6548/3/RICARDO_BARBOSA_SANTOS.pdf.jpg4dfc28bec76dd0d3aa1476bcbe0f6190MD53riufs/65482017-11-24 20:55:13.942oai:ufs.br:riufs/6548Repositório InstitucionalPUBhttps://ri.ufs.br/oai/requestrepositorio@academico.ufs.bropendoar:2017-11-24T23:55:13Repositório Institucional da UFS - Universidade Federal de Sergipe (UFS)false
dc.title.por.fl_str_mv Cultivares de cana-de-açúcar submetido à restrição hídrica
dc.title.alternative.eng.fl_str_mv CULTIVARS OF SUGAR CANE SUBMITTED TO WATER RESTRICTION.
title Cultivares de cana-de-açúcar submetido à restrição hídrica
spellingShingle Cultivares de cana-de-açúcar submetido à restrição hídrica
Santos, Ricardo Barbosa dos
Prolina
Estresse hídrico
Fluorescência da clorofila
Proline
Water stress
Chlorophyll fluorescence
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
title_short Cultivares de cana-de-açúcar submetido à restrição hídrica
title_full Cultivares de cana-de-açúcar submetido à restrição hídrica
title_fullStr Cultivares de cana-de-açúcar submetido à restrição hídrica
title_full_unstemmed Cultivares de cana-de-açúcar submetido à restrição hídrica
title_sort Cultivares de cana-de-açúcar submetido à restrição hídrica
author Santos, Ricardo Barbosa dos
author_facet Santos, Ricardo Barbosa dos
author_role author
dc.contributor.author.fl_str_mv Santos, Ricardo Barbosa dos
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/5570543667939997
dc.contributor.advisor1.fl_str_mv Silva-Mann, Renata
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/4508585088775682
contributor_str_mv Silva-Mann, Renata
dc.subject.por.fl_str_mv Prolina
Estresse hídrico
Fluorescência da clorofila
topic Prolina
Estresse hídrico
Fluorescência da clorofila
Proline
Water stress
Chlorophyll fluorescence
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
dc.subject.eng.fl_str_mv Proline
Water stress
Chlorophyll fluorescence
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
description The increasing demand for biofuels has provided significant increases in the areas of sugar cane in Brazil and in recent decades,and long periods of drought have limited the production of this species. This study aimed to evaluate the performance of cultivars RB 85-5536 and RB 93-509 of cane sugar on water restriction during the first stages of development. Experiment was carried out in the greenhouse of the Department of Agronomic Engineering at UFS in randomized blocks in factorial2 x 4, two cultivars (RB 85-5536 and RB 93-509) and four levels of water in the soil based on predefined at field capacity (100% Cc, 80% Cc, 60% Cc and 40% Cc), with four replications, each replicate consisting of a plant. Were evaluated the initial fluorescence emission (F0), maximum fluorescence (Fm), the quantum yield of photosystem (Fv/Fm) and fluorescence transient OJIP, indices of photosynthetic pigments and proline contents determined in leaves determined +1. The measurements of emission of fluorescence were performed during the period of seven days every two days, from 10 to 12 am, with the aid of fluorometer (OS-30P) and clips fixed on the central portion of the leaf, the contents of pigments were determined in the same period with the aidofaportable chlorophyllmeter (Clorofilog CFL 1030) whereas the proline content in the end of the experiment. The fluorescence emission levels and rates of photosynthetic pigments decreased with the increase of water restriction in both cultivars. The cultivar RB 93-509 has accumulated higher proline contentat the level of stress 60% of Cc. With the increase of stress severe by water restriction occurs a reduction in total levels of chlorophyll fluorescence and photosynthetic pigment contents from the seventh day of stress in both varieties of sugar cane. The cultivar RB 93-509 presents greater sensitivity to water stress than the cultivar RB 85-5536.
publishDate 2011
dc.date.issued.fl_str_mv 2011-02-23
dc.date.accessioned.fl_str_mv 2017-10-02T12:49:17Z
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