Leaf proline accumulation and fruit yield of ‘Pera’ sweet orange trees under natural water stress

IF 1.2 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY
L. M. D. Carvalho, S. B. D. Araújo, H. D. Carvalho, E. A. Girardi, W. S. Soares Filho
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引用次数: 3

Abstract

The water deficit is one of the main limiting factors to the yield of sweet oranges. The present study aimed to determine alternative rootstocks to ‘Rangpur’ lime for ‘Pera’ sweet oranges grown on tropical hardsetting soils with greater potential tolerance to water deficit. Six citrus scion/rootstock combinations were grown during eight years in an orchard established in Sergipe, Brazil. The tree height, number of fruits per plant, cumulated fruit yield, leaf proline content and survival rate of trees were evaluated between 6th and 8th year after planting. Greater rate of tree loss occurred among the sweet orange onto ‘Orlando’ tangelo, which also induced the lowest cumulative fruit yield. After prolonged water deficit, moderate to high proline content was found in trees grafted on Sunki of Florida mandarin × C13 citrange – 012° (TSKFL × CTC13-012), ‘Orlando’ tangelo, ‘Indio’ and ‘Riverside’ citrandarin. Conversely, after a short water deficit during the wet season, trees on ‘San Diego’ citrandarin and Rangpur lime clone of Centro Nacional de Pesquisa Mandioca e Fruticultura – CNPMF 03 ‘Rangpur’ lime showed higher proline content. Trees onto TSKFL × CTC13-012 and ‘Indio’ also induced the greatest accumulated fruit yield at the 8th year after planting. It is assumed that ‘San Diego’ and CNPMF 03 ‘Rangpur’ induce response more quickly to water deficit, whereas TSKFL × CTC13-012 and ‘Indio’ are less susceptible to prolonged deficit. Therefore, trees on ‘San Diego’ and Indio citrandarin, CNPMF-03 ‘Rangpur’ lime, TSKFL × CTC13-012 hybrid present greater potential to tolerate water deficit and produce more fruits on the hardsetting soils of the coastal tablelands of the Brazilian Northeast.
自然水分胁迫下Pera甜橙叶片脯氨酸积累与果实产量
水分亏缺是制约甜橙产量的主要因素之一。本研究旨在确定在热带硬硬土壤上生长的“Pera”甜橙替代“Rangpur”石灰的砧木,这些土壤具有更大的耐缺水潜力。在巴西Sergipe建立的果园中,在8年内种植了6种柑橘接穗/砧木组合。在种植后第6 ~ 8年,对树高、单株果数、累积果产量、叶片脯氨酸含量和成活率进行评价。在“奥兰多”上的甜橙树损失率更高,这也导致了最低的累积果实产量。长时间缺水后,嫁接在Sunki上的佛罗里达柑× C13柑-012°(TSKFL × CTC13-012)、‘奥兰多’丹吉洛、‘Indio’和‘Riverside’柑橘素的树脯氨酸含量中高。相反,在雨季短暂缺水后,“圣地亚哥”柠檬素和国家果树栽培中心的“Rangpur”石灰无性系- cnpmf03“Rangpur”石灰的树木显示出更高的脯氨酸含量。TSKFL × CTC13-012和‘Indio’在种植后第8年的累积果实产量也最高。假设‘San Diego’和CNPMF 03‘Rangpur’对水分亏缺的反应更快,而TSKFL × CTC13-012和‘Indio’对长期亏缺的反应不那么敏感。因此,“圣迭戈”和“印第诺”柠檬、CNPMF-03“Rangpur”石灰、TSKFL × CTC13-012杂交品种的树木在巴西东北部沿海高原的硬结土壤上表现出更大的耐受缺水和产出更多果实的潜力。
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来源期刊
Bragantia
Bragantia AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
2.40
自引率
8.30%
发文量
33
审稿时长
4 weeks
期刊介绍: Bragantia é uma revista de ciências agronômicas editada pelo Instituto Agronômico da Agência Paulista de Tecnologia dos Agronegócios, da Secretaria de Agricultura e Abastecimento do Estado de São Paulo, com o objetivo de publicar trabalhos científicos originais que contribuam para o desenvolvimento das ciências agronômicas. A revista é publicada desde 1941, tornando-se semestral em 1984, quadrimestral em 2001 e trimestral em 2005. É filiada à Associação Brasileira de Editores Científicos (ABEC).
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