Water strategy improves the inflorescence primordia formation of 'Arra 15' grapevine in the Brazilian semiarid region

Failure in irrigation management of grapevines grown in the Brazilian semiarid region can affect bud fertility. Adequate irrigation, considering both the development of bunches in the current cycle and the formation of fertile buds for subsequent cycles, can bring significant advances to viticulture...

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Bibliographic Details
Published in:	Scientific reports Vol. 14; no. 1; p. 6678
Main Authors:	de Oliveira, Cíntia Patrícia Martins, Simões, Welson Lima, de Melo Chaves, Agnaldo Rodrigues, Silva, Jucicléia Soares da, Pereira Ribeiro Teodoro, Larissa, de Camargos, Liliane Santos, Gava, Ricardo, Sobral, Yuri Rafael Alves, Teodoro, Paulo Eduardo
Format:	Journal Article
Language:	English
Published:	London Nature Publishing Group UK 20-03-2024 Nature Publishing Group Nature Portfolio
Subjects:	631/449 704/172 Brazil Buds Carbohydrates Chlorophyll Chlorophyll - metabolism Evapotranspiration Fertile buds Fertility Flowering Gas exchange Humanities and Social Sciences Inflorescence - metabolism Irrigation Irrigation management multidisciplinary Photosynthesis Plant Leaves - metabolism Primordia Science Science (multidisciplinary) Semiarid lands Stomata Stomatal conductance Sugar Sugars - metabolism Transpiration Vine physiology Viticulture Vitis - metabolism Vitis vinifera L Water - metabolism Water deficit Water management Brazil Vine physiology Irrigation management Fertile buds L Water deficit Vitis vinifera L
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Summary:	Failure in irrigation management of grapevines grown in the Brazilian semiarid region can affect bud fertility. Adequate irrigation, considering both the development of bunches in the current cycle and the formation of fertile buds for subsequent cycles, can bring significant advances to viticulture. Therefore, the objective of this research was to investigate the effect of different irrigation levels during flowering on the formation of buds and potential bunches of 'Arra 15' grapevine and its relationship with metabolic processes. A field experiment was carried out in a commercial vineyard in Petrolina, Pernambuco, Brazil, during the 2021 and 2022 seasons. The experiment was designed in randomized blocks with four replications and five irrigation levels (70; 85; 100; 115 and 130% of crop evapotranspiration – ETc) during three production cycles. The variables fertile bud, vegetative bud, dead bud, potential fertility of the basal, median, and apical regions of the branches, number of potential bunches, reducing sugar, total soluble sugar, net photosynthesis, stomatal conductance, transpiration, and relative chlorophyll index were evaluated. The 115% ETc irrigation level improved the number of fertile buds and number of potential bunches. Irrigation level above 115% ETc increased gas exchange and relative chlorophyll index, while 70% ETc increased leaf sugar content. The most appropriate irrigation strategy is the application of 115% ETc during the flowering stage, for the increase of fertile buds and potential bunches of the next cycle, without influencing the vine metabolism. Total soluble sugars are a promising indicator of water deficit during flowering and as an indicator of vegetative bud formation for the next cycle.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	2045-2322 2045-2322
DOI:	10.1038/s41598-024-57215-7