Photosynthetic capacity of 'Niagara Rosada' grapes grown under transparent plastic covering

Ciência Rural

Esteves, Barbara dos Santos¹  Figueiredo, Fábio Afonso Mazzei Moura de Assis²  Ferraz, Tiago Massi²  Viana, Leandro Hespanhol¹  Martins, Amanda Oliveira¹  Almeida, Luciana Venturotti Braun de¹  Rodrigues, Weverton Pereira¹  Campostrini, Eliemar¹  Deus, Bruna Corrêa da Silva de¹ 

[1]Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, Brazil

[2]Universidade Estadual do Maranhão, Imperatriz, Brazil

关键词: photosynthesis;    chlorophyll fluorescence;    Vitisla brusca;    covered system;   

DOI  :  10.1590/0103-8478cr20150400

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

:New techniques in tropical regions such as use of transparent plastic covering (TPC), have been employed in grapes to avoid the wetting leaves and fruits, which can reduce the occurrence of fungal diseases, reduce the use of sprays, and reduce damage caused by hail and high winds. TPC may significantly affect the photosynthetic rates of grapevines cultivated in tropical regions, and thus have strong effects on plant productivity and improve fruit quality. However, in the North of Rio de Janeiro region there are lacks of studies related to TPC effects on photosynthetic capacity. The objective of this study was to evaluate the photosynthetic capacity in 'Niagara Rosada' vines grown under TPC and without transparent plastic covering (WTPC). The experiment was conducted between April and June 2013, on Tabuinha farm, located in the 3rd district of São Fidélis, Rio de Janeiro State, Brazil. A completely randomized block design was used with two treatments (TPC and WTPC) and twelve replications. Evaluations consisted of climatological variables, gas exchange and maximum quantum efficiency of open photosystem II centers-quantum yield (Fv/Fm) It was possible to observe that under TPC maximum temperature increase of 2.3°C, relative humidity reduced 1.5%, vapor pressure deficit increase 0.4kPa, and light intensity reduced 47.7%. These changes did not cause photochemical damage to the leaves. The TPC promoted higher net photosynthetic rate at 800h, which was associated with higher stomatal conductance. Thus, the TPC used in the northern region of Rio de Janeiro State did not impair the photosynthetic capacity of 'Niagara Rosada' vines.

【 授权许可】

Unknown