Data/hora: 23/06/2024 08:22:44

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 20/01/2017
Data da última atualização: | 08/02/2017
Autoria: | SANTANA-VIEIRA, D. D. S.; FRESCHI, L.; ALMEIDA, L. A. da H.; MORAES, D. H. S. de; NEVES, D. M.; SANTOS, L. M. DOS; BERTOLDE, F. Z.; SOARES FILHO, W. dos S.; COELHO FILHO, M. A.; GESTEIRA, A. da S.
Afiliação: | DAYSE DRIELLY SOUZA SANTANA-VIEIRA, UESC; LUCIANO FRESCHI, USP; LUCAS ARAGÃO DA HORA ALMEIDA, UESC; DIOGO HENRIQUE SANTOS DE MORAES, UESC; DIANA MATOS NEVES, UESC; LIZIANE MARQUES DOS SANTOS, UFRB; FABIANA ZANELATO BERTOLDE, IF Baiano; WALTER DOS SANTOS SOARES FILHO, CNPMF; MAURICIO ANTONIO COELHO FILHO, CNPMF; ABELMON DA SILVA GESTEIRA, CNPMF.
Título: | Survival strategies of citrus rootstocks subjected to drought.
Ano de publicação: | 2016
Fonte/Imprenta: | Scientific Reports, v.6, p.38775, December 2016.
ISSN: | 2045-2322
Idioma: | Português
Conteúdo: | Two citrus rootstocks, Rangpur lime (RL) and Sunki Maravilha mandarin (SM), were analyzed either ungrafted or grafted with their reciprocal graft combinations or with shoot scions of two commercial citrus varieties: Valencia orange (VO) and Tahiti acid lime (TAL). All graft combinations were subjected to distinct watering regimes: well-watered, severe drought and rehydration. Growth and water relation parameters, gas exchange as well as sugar and hormone profiles were determined. Data indicated that RL adopted a dehydration avoidance strategy and maintained growth, whereas SM adopted a dehydration tolerance strategy focused on plant survival. Compared with RL, the leaves and roots of SM exhibited higher concentrations of abscisic acid and salicylic acid, which induced drought tolerance, and accumulation of carbohydrates such as trehalose and raffinose, which are important reactive oxygen species scavengers. SM rootstocks were able to transfer their survival strategy to the grafted shoot scions (RL, VO, TAL). Because of their contrasting survival strategies, RL reached the permanent wilting point more quickly than SM whereas SM recovered from prolonged droughts more efficiently than RL. This is one of the most complete studies of drought tolerance mechanisms in citrus crops and is the first to use reciprocal grafting to clarify scion/rootstock interactions.
Thesagro: | Fruta citríca.
Thesaurus Nal: | Citrus.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (31628-1) - UPC - AP - DD - Publicação digital -  -  - DIS