Physiological Responses of Selected Vegetable Crop Species to Water Stress

Nemeskéri, Eszter; Helyes, Lájos

doi:10.3390/agronomy9080447

Cited by 89 publications

(39 citation statements)

References 120 publications

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“…The low soil water availability treatment did not significantly affect shoot biomass of cucumber crops (Table 4), but it produced smaller leaves (data not shown) reducing LAI values significantly ( Figure 2) throughout most of the autumn-winter and spring cycles [15,19,29]. Despite the lower LAI values, fruit yield and physical fruit quality of the cucumber grown under low soil water availability were not significantly affected ( Table 6).…”

Section: Discussionmentioning

confidence: 93%

“…These values might cause mild water stress [12,27], but not so severe as to clearly inhibit stomata conductance and photosynthesis per unit leaf area or to increase root dry matter production [30,31]. However, they may reduce leaf growth and its role as a sink for assimilates [17,19]. Thus, for high-value greenhouse crops, such as cucumber (about 12 € m −3 of water-productivity [8]), maintaining low soil water availability throughout the whole crop cycle may prove risky, especially during periods of high evaporative demand (spring cycles), and it may, therefore, be unadvisable over the whole crop cycle in commercial Mediterranean greenhouses.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, a recent study, carried out in a typical greenhouse on the SE Spanish Mediterranean coast with a silty loam soil [14], is supporting the use of high irrigation frequencies in soil-grown greenhouse crops: a higher biomass production and fruit yield was found in a zucchini crop irrigated at SMP of −10 kPa, compared to that irrigated when the SMP was −25 kPa. A higher soil water availability can theoretically facilitate crop water uptake and improve soil nutrient availability [15], especially under water stress conditions, but the responses of plant species to water stress or availability significantly depend on the intensity and duration of stress and their stages of development [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Vegetable Crops Grown under High Soil Water Availability in Mediterranean Greenhouses

Bonachela

González²,

Fernández³

et al. 2020

Water

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The soil water availability of six vegetable crop cycles, irrigated with water of 0.4 dS m−1 electrical conductivity, was modified by varying the irrigation frequency in typical Mediterranean greenhouses at SE Spain. The soil matric water potential (SMP) in the middle of the loamy soil layer where most roots usually grow was maintained between −10 and −20 kPa (H), −20 and −30 kPa (C), and −30 and −50 kPa (L) for the crops grown under high, conventional and low soil water availability, respectively, while the total irrigation water applied was similar for the three treatments. The high soil water availability (H) did not improve the fresh weight of total, marketable and first class fruits, or the shoot biomass and partitioning. The irrigation frequency did not affect the total root biomass at the end of the autumn–winter cucumber, but the crop under L distributed its root biomass more homogenously throughout the soil profile than the crop under H. Regulating the soil water availability (maintaining the SMP higher than or close to the level at which crop water stress may occur) over the cycle as a function of crop conditions or farmers’ requirements appears to be a useful management practice for controlling soil root distribution or shoot partitioning.

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vegetable Crops Grown under High Soil Water Availability in Mediterranean Greenhouses

Bonachela

González²,

Fernández³

et al. 2020

Water

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“…Several epidemiological studies have shown that consumption of leafy vegetables such as lettuce is important for reducing the risk of chronic diseases, such as diabetes, cancer, and cardiovascular disease [4,5]. These health benefits have been linked to a range of micro-and macro-nutrients, Sensitivity to salt stress differs with the various stages of a plant's development [9,17], with stronger responses during reproductive stages than in early growth [17]. In lettuce, several studies have been performed using chlorophyll fluorescence (CF) to investigate the effect of a range of potentially stressful factors, such as light quality [7] and disease resistance [18], on outcomes such as post-harvest quality [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Response to Salt Stress in Lettuce: Changes in Chlorophyll Fluorescence Parameters, Phytochemical Contents, and Antioxidant Activities

Shin

Bhandari

et al. 2020

Agronomy

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Chlorophyll fluorescence (CF), growth parameters, phytochemical contents [proline, chlorophyll, ascorbic acid, total phenol content (TPC), total flavonoid content (TFC)], and antioxidant activities were investigated in lettuce (Lactuca sativa L.) seedlings grown under different sodium chloride (NaCl) concentrations (0, 50, 100, 200, 300, and 400 mM) in a controlled environment for eight days. The parameters were evaluated at two days intervals. Almost of the CF and growth parameters as well as phytochemicals were significantly affected by both NaCl concentrations and progressive treatment schedule. The maximum quantum yield (Fv/Fm), effective quantum yield of photochemical energy conversion in PSII [Y(PSII)], coefficient of photochemical quenching (qP), coefficient of non-photochemical quenching (qN), and ratio of fluorescence decline (Rfd) showed decrements only at the highest saline concentration (400 mM), whereas the quantum yield of non-regulated energy dissipation in PSII [Y(NO)] exhibited a dissipation trend. All the growth parameters decreased with increasing NaCl concentrations, showing the highest decrease (~8 fold) in shoot fresh weight, compared to control seedlings. Proline significantly increased with increasing NaCl concentration and treatment time. Other phytochemicals decreased with the increase in NaCl concentration and reached their lowest at 400 mM. Overall, the results showed major changes in all parameters when the seedlings were grown at a NaCl concentration of 400 mM. The present findings will be useful for understanding the differential effect of NaCl concentrations in lettuce seedlings, and also might be useful to optimize the NaCl concentrations in other crops grown in controlled environmental conditions.

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“…Therefore, it is important to use water resources more efficiently, which will help us in preserving water resources. One of the ways to conserve water is by using the appropriate crop species and cultivars that have low requirements for water [2].…”

Section: Introductionmentioning

confidence: 99%

The Use of Appropriate Cultivar of Basil (Ocimum basilicum) Can Increase Water Use Efficiency under Water Stress

et al. 2020

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Drought is one of the major yield constraints of crop productivity for many crops. In addition, nowadays, climate change creates new challenges for crop adaptation in stressful environments. The objective of the present study was to determine the effect of water stress on five cultivars of basil (Mrs Burns, Cinnamon, Sweet, Red Rubin, Thai) and whether water use efficiency (WUE) can be increased by using the appropriate cultivar. Water stress affected the fresh and dry weight and also the partitioning of dry matter to leaves, flowers, and stems. Also, there are cultivars, such as Mrs Burns and Sweet, which were not affected by the limited amount of water and continued to produce a high amount of dry matter and also showed high essential oil yield. Essential oil content was not affected by the irrigation; however, essential oil yield was affected by the irrigation, and the highest values were found at Mrs Burns. The water use efficiency was affected by the cultivar and irrigation level, and the highest was found at Mrs Burns. The results show that using appropriate cultivars basil can achieve higher WUE and allow saving water resources and utilizing fields in areas with limited water resources for irrigation.

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Physiological Responses of Selected Vegetable Crop Species to Water Stress

Cited by 89 publications

References 120 publications

Vegetable Crops Grown under High Soil Water Availability in Mediterranean Greenhouses

Vegetable Crops Grown under High Soil Water Availability in Mediterranean Greenhouses

Response to Salt Stress in Lettuce: Changes in Chlorophyll Fluorescence Parameters, Phytochemical Contents, and Antioxidant Activities

The Use of Appropriate Cultivar of Basil (Ocimum basilicum) Can Increase Water Use Efficiency under Water Stress

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