Physiological responses of orange trees subject to regulated deficit irrigation and partial root drying

2021 ◽  
Author(s):  
Sajad Jamshidi ◽  
Shahrokh Zand-Parsa ◽  
Dev Niyogi
Keyword(s):  
Deficit Irrigation ◽  
Physiological Responses ◽  
Regulated Deficit Irrigation ◽  
Partial Root Drying ◽  
Orange Trees

scholarly journals Physiological and Biochemical Responses of Orange Trees to Different Deficit Irrigation Regimes

Plants ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 423 ◽  
Author(s):  
Puglisi ◽  
Nicolosi ◽  
Vanella ◽  
Piero ◽  
Stagno ◽  
...  
Keyword(s):  
Deficit Irrigation ◽  
Crop Production ◽  
Root Zone ◽  
Irrigation Season ◽  
Regulated Deficit Irrigation ◽  
Resistivity Tomography ◽  
Micro Irrigation ◽  
Response To Water ◽  
Orange Trees ◽  
Physiological And Biochemical

The article presents the results of research consisting of the application of deficit irrigation (DI) criteria, combined with the adoption of micro-irrigation methods, on orange orchards (Citrus sinensis (L.) Osbeck) in Sicily (Italy) during the irrigation season of 2015. Regulated deficit irrigation (RDI, T3) and partial root-zone drying (PRD, T4) strategies were compared with full irrigation (T1) and sustained deficit irrigation (SDI, T2) treatments in terms of physiological, biochemical, and productive crop response. A geophysical survey (electrical resistivity tomography, ERT) was carried out to identify a link between the percentages of drying soil volume in T4 with leaves abscisic acid (ABA) signal. Results highlight that the orange trees physiological response to water stress conditions did not show particular differences among the different irrigation treatments, not inducing detrimental effects on crop production features. ABA levels in leaves were rather constant in all the treatments, except in T4 during late irrigation season. ERT technique identified that prolonged drying cycles during alternate PRD exposed more roots to severe soil drying, thus increasing leaf ABA accumulation.

Physiological responses of almond trees under regulated deficit irrigation using saline and desalinated reclaimed water

2021 ◽  
Vol 258 ◽  
pp. 107172
Author(s):  
Gaetano Alessandro Vivaldi ◽  
Salvatore Camposeo ◽  
Cristina Romero-Trigueros ◽  
Francisco Pedrero ◽  
Gabriele Caponio ◽  
...  
Keyword(s):  
Deficit Irrigation ◽  
Physiological Responses ◽  
Reclaimed Water ◽  
Regulated Deficit Irrigation ◽  
Almond Trees

scholarly journals Photosynthesis and cell respiration modulated by water deficit in grapevine (Vitis vinifera L.) cv. Cabernet Sauvignon

2009 ◽  
Vol 21 (2) ◽  
pp. 95-102 ◽  
Author(s):  
Sílvia A. Martim ◽  
Mirella P. Santos ◽  
Anderson L. Peçanha ◽  
Celso Pommer ◽  
Eliemar Campostrini ◽  
...  
Keyword(s):  
Water Potential ◽  
Water Deficit ◽  
Leaf Water Potential ◽  
Deficit Irrigation ◽  
Physiological Responses ◽  
Leaf Water ◽  
Cabernet Sauvignon ◽  
O2 Consumption ◽  
Cell Respiration ◽  
Regulated Deficit Irrigation

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.

scholarly journals Irrigation Protocols in Different Water Availability Scenarios for ‘Crimson Seedless’ Table Grapes under Mediterranean Semi-Arid Conditions

Water ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 22
Author(s):  
Abdelmalek Temnani ◽  
María R. Conesa ◽  
Manuel Ruiz ◽  
Juan A. López ◽  
Pablo Berríos ◽  
...  
Keyword(s):  
Deficit Irrigation ◽  
Root Zone ◽  
Maximum Temperature ◽  
Stem Water Potential ◽  
Regulated Deficit Irrigation ◽  
Table Grapes ◽  
Use Efficiency ◽  
Partial Root Drying ◽  
Gaussian Regression ◽  
Sustainable Irrigation

For three consecutive years (2015–2017), two deficit irrigation (DI) strategies were used in a 12-year old vineyard (cv. ‘Crimson Seedless’) to implement a sustainable irrigation protocol according to the available water for the farmer. Four different irrigation treatments were assessed: (i) Control (CTL), irrigated to satisfy the maximum crop water requirements throughout the entire growing season; two DI treatments irrigated as CTL except during post-veraison, when the vines were irrigated at 50% CTL: (ii) Regulated Deficit Irrigation (RDI); and (iii) Partial Root Drying (PRD), alternating the wet and dry sides of the root zone, and (iv) irrigated according to the criteria followed by the farmer (FARM), and conditioned by the availability of water each season. The DI strategies resulted in a 50% increase in water use efficiency in the first two years and 81% during the third year. Weekly deficit irrigation protocols are proposed, which specify a maximum difference of 0.22 MPa of midday stem water potential with respect to well-watered vines for a range of irrigation water availabilities between 4000 and 7000 m3 ha−1. An applied water prediction model based on the Gaussian regression using day of the year and maximum temperature of the day is also proposed.

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