Growth and Physiological Responses of Vegetable Crops to Water Deficit Stress

Vashi, Henil D.; Patel, P. P.; Bardhan, Kirti

doi:10.9734/jeai/2020/v42i530523

Cited by 3 publications

(3 citation statements)

References 40 publications

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“…This phenomenon is called photorespiration which inhibits photosynthesis and leads to formation of reactive oxygen species (ROS) [ROS, reviewed in Murata et al (2007)]. Therefore, in drought conditions, photosynthetic activity will be restricted due to less CO 2 being supplied (Taiz and Zeiger, 1998;Vashi et al, 2020). This explains the lower WUE at 7.5% EVC and shows that less CO 2 was assimilated despite minimal water use at this level.…”

Section: Discussionmentioning

confidence: 99%

Optimizing Sensor-Based Irrigation Management in a Soilless Vertical Farm for Growing Microgreens

Tavan

Wee

Brodie

et al. 2021

Front. Sustain. Food Syst.

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With water resources constantly becoming scarcer, and 70% of freshwater used for the agriculture sector, there is a growing need for innovative methods to increase water use efficiency (WUE) of food production systems and provide nutrient-dense food to an increasing population. Sensor technology has recently been introduced to the horticulture industry to increase resource use efficiency and minimize the environmental impacts of excessive water use. Identifying the effects of irrigation levels on crop performance is crucial for the success of sensor-based water management. This research aimed to optimize WUE in a soilless microgreen production system through identification of an optimal irrigation level using a sensor that could facilitate the development of a more efficient, low-cost automated irrigation system. A dielectric moisture sensor was implemented to monitor water levels at five irrigation setpoints: 7.5, 17.5, 25, 30, and 35 percent of the effective volume of the container (EVC) during a 14-day growth cycle. To validate the sensor performance, the same irrigation levels were applied to a parallel trial, without sensor, and water levels were monitored gravimetrically. Plant water status and stress reaction were evaluated using infrared thermal imaging, and the accumulation of osmolytes (proline) was determined. Results showed that, proline concentration, canopy temperature (Tc), canopy temperature depression (CTD), and crop water stress index (CWSI) increased at 7.5% EVC in both sensor-based and gravimetric treatments, and infrared index (Ig) and fresh yield decreased. The dielectric moisture sensor was effective in increasing WUE. The irrigation level of 17.5% EVC was found to be optimal. It resulted in a WUE of 88 g/L, an improvement of 30% over the gravimetric method at the same irrigation level. Furthermore, fresh yield increased by 11.5%. The outcome of this study could contribute to the automation of precision irrigation in hydroponically grown microgreens.

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Section: Discussionmentioning

confidence: 99%

Optimizing Sensor-Based Irrigation Management in a Soilless Vertical Farm for Growing Microgreens

Tavan

Wee

Brodie

et al. 2021

Front. Sustain. Food Syst.

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“…The decreases in fruit production may be due to a higher number of floral abortions and small fruits. Drought stress has been shown to decrease yield, and at the same time produce senescence of leaves (Vashi et al, 2020). A higher fruit production of the ECU-2254b initially under water limitations indicates a greater investment of photoassimilates towards fruit production, an important characteristic at times of less water availability.…”

Section: Weight Of the Different Organsmentioning

confidence: 98%

Morphological and physiological responses of two species of Capsicum (Capsicum annuum L. and Capsicum chinense Jacq.) under conditions of water deficit

et al. 2022

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Drought and water scarcity, effects from ongoing climate change, are between main limitations in agricultural production. In this sense, this study aimed to compare the differences morphological and physiological responses between local cultivars of Capsicum annuum L. and Capsicum chinense Jacq under WD conditions. After 20 days of being transplanted and maintained with adequate irrigation and fertilization, in a randomized block design, plants of four local cultivars (2 of C. annuum and 2 of C. chinense) were subjected to two treatments: WD consisting of 14 days without irrigation, and plants watered every three days. The relative water content (RWC), root volume, leaf area, specific leaf area, dry weight of the different organs and leaf nitrogen concentration were measured. The results show that, under conditions of WD, plants of C. annuum and C. chinense decreases significantly leaf RWC, root volumes, total growth and leaf nitrogen concentration. In the case of C. annuum, the WD affected production, which varied between cultivars. It seems that the mobilization of photoassimilates towards fruits is a strategy for a higher production for some cultivar of C. annuum as demonstrated in the cultivar ECU-2254b, however, it was the cultivar that showed the lowest RWC in both conditions of water availability. The cultivar of C. chinense ECU-2241, showed a better tolerance to WD presenting greater root growth and greater RWC.

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“…In recent times, climate change is a global phenomenon which is a great concern for food security of the increasing population which is expected to be about 10 billion at the end of 2050 [1]. With the fast-growing global population, the demand for soil and land for crop production is likely to increase, and more urban area development need to be addressed by developing new and modified agricultural systems [2].…”

Section: Introductionmentioning

confidence: 99%

Effect of Fluid Mechanics System in Growth of Vegetable Crops using Hydroponics Technique Compared to Conventional System

Ranganath

Nagaraj

Singh

2023

ARFMTS

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Hydroponic techniques have major advancements in the recent years compared to Conventional Systems. The flow pattern of fluid used in hydroponic system in a cultivation container affects the growth of plants. Vegetables such as Strawberry, Basil, Cauliflower, Tomato, Spinach and Radish saplings were grown in soil and soilless methods to compare the growth, yield and nutritional value. As for the conventional system, the plants were grown in soil and for hydroponic system Nutrient Film Technique, Deep Water Culture and Wick Systems were used to cultivate plants. On the completion of the growth of the plants, the samples were analysed in laboratory for biochemical analyses. The total yield of Strawberry was 46.5% and tomato with 42.05% in Hydroponics system compared to soil system, whereas in Biochemical analysis Cauliflower gave 10.02% higher results. Chlorophyll content in Basil was observed to be 0.15mg/g and Spinach with 0.04 mg/g which was different from other corresponding results. The commercially harvested root of radish showed a total growth of 22.4 cm in the hydroponic system. The root and shoot lengths had significantly better results in Hydroponic system. Nutritionally, there were not many differences in few aspects whereas the hydroponically grown plants had better qualitative results. It was evident by the obtained results that, the hydroponically grown plants had better results when compared to the plants that were grown conventionally and the fluid flow patterns could also affect the productivity in the hydroponics system.

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Growth and Physiological Responses of Vegetable Crops to Water Deficit Stress

Cited by 3 publications

References 40 publications

Optimizing Sensor-Based Irrigation Management in a Soilless Vertical Farm for Growing Microgreens

Optimizing Sensor-Based Irrigation Management in a Soilless Vertical Farm for Growing Microgreens

Morphological and physiological responses of two species of Capsicum (Capsicum annuum L. and Capsicum chinense Jacq.) under conditions of water deficit

Effect of Fluid Mechanics System in Growth of Vegetable Crops using Hydroponics Technique Compared to Conventional System

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