Leaf morphological changes in sugarcane cultivars in response to water deficit

Autor: Renata Passos Pincelli, Marcelo de Almeida Silva
Přispěvatelé: Universidade Estadual Paulista (Unesp)
Jazyk: portugalština
Rok vydání: 2012
Předmět:
Zdroj: Bioscience Journal ; Vol. 28 No. 4 (2012): July/Aug.; 546-556
Bioscience Journal ; v. 28 n. 4 (2012): July/Aug.; 546-556
Bioscience journal
Universidade Federal de Uberlândia (UFU)
instacron:UFU
Web of Science
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Bioscience Journal, Vol 28, Iss 4 (2012)
ISSN: 1981-3163
Popis: Made available in DSpace on 2013-08-12T18:23:03Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 Made available in DSpace on 2013-09-30T17:44:47Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:20:10Z No. of bitstreams: 0 Made available in DSpace on 2014-05-20T13:20:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01 O objetivo do presente trabalho foi verificar as respostas de variáveis morfológicas de quatro cultivares comerciais de cana-de-açúcar (SP81-3250, SP83-2847, RB855453 e RB72454), sob dois regimes hídricos, e distingui-las entre tolerantes e susceptíveis. Aos 84 dias após a emergência, as plantas foram submetidas aos tratamentos hídricos, sem deficiência e com deficiência, e avaliadas em três épocas, zero, 28 e 56 dias, após a implantação desses tratamentos (DAT). As cultivares SP81-3250 e SP83-2847, quando submetidas à deficiência hídrica por período prolongado no início do desenvolvimento, apresentam maior largura de folhas, menor dano ao número de folhas verdes e área foliar; aumento na densidade estomática nas superfícies adaxial e abaxial foliares, e maior produção de massa de matéria seca, sendo assim consideradas tolerantes. O comprimento da folha +3 não permitiu caracterizar as variedades quanto a tolerância à deficiência hídrica. The aim of this study was to determine the response of morphological traits of four tolerant and susceptible sugarcane cultivars (SP81-3250, SP83-2847, RB855453 and RB72454) related to two water regimes. At 84 days after emergence the plants were submitted to water availability treatments (no water deficiency and water deficiency), and evaluated in three periods: zero, 28 and 56 days, after implantation of these treatments (DAT). The cultivars SP81-3250 and SP83-2847, when subjected to water stress for prolonged periods in early development, present higher leaf width, less damage to the green leaf number and leaf area, an increase in stomatal density in adaxial and abaxial leaf surface, and higher production of dry matter, and therefore were considered tolerant. The leaf +3 length not allowed to characterize the varieties to drought tolerance. Univ Estadual Paulista UNESP, Fac Ciencias Agron FCA, Dept Agri & Melhoramento Vegetal, Botucatu, SP, Brazil FCA UNESP, Dept Prod Vegetal Agr, Botucatu, SP, Brazil Univ Estadual Paulista UNESP, Fac Ciencias Agron FCA, Dept Agri & Melhoramento Vegetal, Botucatu, SP, Brazil FCA UNESP, Dept Prod Vegetal Agr, Botucatu, SP, Brazil
Databáze: OpenAIRE
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