Effect of regulated deficit irrigation on the content of soluble sugars, organic acids and endogenous hormones in Cabernet Sauvignon in the Ningxia region of China

Winegrape productivity and quality has been related to the regulated deficit irrigation, with important implications for the plant bioenergetics. When water deficit is imposed to grapevine plants, alterations in overall photosynthesis and cell respiration are observed. The aim of this study was to assess the modulations promoted by water stress on photosynthesis and respiration in leaves of the cv. Cabernet Sauvignon (cv. CS) for better understanding the physiological responses related to its drought tolerance and quality improvement under water deficit. For this purpose, measurements of photosynthetic efficiency, leaf water potential, gas exchange and O2 consumption were carried out. Leaf water potential, photosynthesis, stomatal conductance, transpiration and internal carbon concentration were significantly reduced upon stress, suggesting that plants of cv. CS present higher water use efficiency (A N/E) and lower carboxylative capacity (A N/Ci) under this condition. On the other hand, cell respiration increased more than 70 % as estimated by the increase of O2 consumption measured 12 days after suspension of irrigation. Most of this effect was related to a four-fold increase of the mitochondrial alternative oxidase (AOX) activity. These data indicate a key role for the AOX pathway in the physiological responses of grapevines to water deficit, and it implies that analyses of the AOX activation patterns should be useful for programs aiming to improve the consistency of fruit production and quality of winegrape cultivars by regulated deficit irrigation.

Download Full-text

Sensory Impact of Extended Maceration and Regulated Deficit Irrigation on Washington State Cabernet Sauvignon Wines

American Journal of Enology and Viticulture ◽

10.5344/ajev.2013.13068 ◽

2013 ◽

Vol 64 (4) ◽

pp. 505-514 ◽

Cited By ~ 9

Author(s):

L. F. Casassa ◽

R. C. Larsen ◽

C. W. Beaver ◽

M. S. Mireles ◽

M. Keller ◽

...

Keyword(s):

Deficit Irrigation ◽

Washington State ◽

Cabernet Sauvignon ◽

Regulated Deficit Irrigation

Download Full-text

Effect of regulated deficit irrigation on fatty acids and their derived volatiles in ‘Cabernet Sauvignon’ grapes and wines of Ningxia, China

Food Chemistry ◽

10.1016/j.foodchem.2017.10.018 ◽

2018 ◽

Vol 245 ◽

pp. 667-675 ◽

Cited By ~ 18

Author(s):

Yan-lun Ju ◽

Min Liu ◽

Ting-yao Tu ◽

Xian-fang Zhao ◽

Xiao-feng Yue ◽

...

Keyword(s):

Fatty Acids ◽

Deficit Irrigation ◽

Cabernet Sauvignon ◽

Regulated Deficit Irrigation

Download Full-text

Effects of Regulated Deficit Irrigation on Amino Acid Profiles and Their Derived Volatile Compounds in Cabernet Sauvignon (Vitis vinifera L.) Grapes and Wines

Molecules ◽

10.3390/molecules23081983 ◽

2018 ◽

Vol 23 (8) ◽

pp. 1983 ◽

Cited By ~ 8

Author(s):

Yan-lun Ju ◽

Guo-qian Xu ◽

Xiao-feng Yue ◽

Xian-fang Zhao ◽

Ting-yao Tu ◽

...

Keyword(s):

Amino Acid ◽

Volatile Compounds ◽

Deficit Irrigation ◽

Soluble Solids ◽

Control Treatment ◽

Control Group ◽

Vitis Vinifera L ◽

Cabernet Sauvignon ◽

Regulated Deficit Irrigation ◽

Amino Acid Concentrations

Amino acid contents and their derived volatile compositions in Cabernet Sauvignon grapes and wines after regulated deficit irrigation (RDI) were investigated during the 2015 and 2016 growing seasons in Yinchuan (NingXia, China). High-performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GC-MS) were used for amino acid and volatile compound analyses. Three RDI strategies were tested: 60% (RDI-1), 70% (RDI-2), and 80% (RDI-3) of grapevine estimated evapotranspiration (ETc), and 100% ETc was used as the control group (CK). RDI-treated vines had lower yields and berry weights with higher total soluble solids than the control treatment. RDI-1 increased proline levels in berries and wines. RDI-2 enhanced tyrosine and asparagine levels in wines. RDI-3 enhanced arginine, alanine, valine, leucine, and isoleucine levels in berries and wines. RDI-2 and RDI-3 increased the concentrations of 2-methyl-1-butyl acetate, benzaldehyde, 3-methyl-1-pentanol, and 3-methyl-1-butanol in wines. The accumulation of volatile compounds was closely related to the amino acid concentrations—especially isoleucine, valine, and leucine—in grapes. Our results showed that RDI treatments altered amino acid concentrations and their derived volatile compositions in wines.

Download Full-text