scholarly journals Response of Plant Rhizosphere Microenvironment to Water Management in Soil- and Substrate-Based Controlled Environment Agriculture (CEA) Systems: A Review

2021 ◽  
Vol 12 ◽  
Author(s):  
Bo Tan ◽  
Yihan Li ◽  
Tiegang Liu ◽  
Xiao Tan ◽  
Yuxin He ◽  
...  
Keyword(s):  
Water Management ◽  
Environmental Parameters ◽  
High Tech ◽  
Controlled Environment ◽  
Relevant Research ◽  
Efficient Tool ◽  
Physiological Processes ◽  
Controlled Environment Agriculture ◽  
Productivity Decline ◽  
Potential Food

As natural agroecology deteriorates, controlled environment agriculture (CEA) systems become the backup support for coping with future resource consumption and potential food crises. Compared with natural agroecology, most of the environmental parameters of the CEA system rely on manual management. Such a system is dependent and fragile and prone to degradation, which includes harmful bacteria proliferation and productivity decline. Proper water management is significant for constructing a stabilized rhizosphere microenvironment. It has been proved that water is an efficient tool for changing the availability of nutrients, plant physiological processes, and microbial communities within. However, for CEA issues, relevant research is lacking at present. The article reviews the interactive mechanism between water management and rhizosphere microenvironments from the perspectives of physicochemical properties, physiological processes, and microbiology in CEA systems. We presented a synthesis of relevant research on water–root–microbes interplay, which aimed to provide detailed references to the conceptualization, research, diagnosis, and troubleshooting for CEA systems, and attempted to give suggestions for the construction of a high-tech artificial agricultural ecology.

scholarly journals Modulating Vapor Pressure Deficit in the Plant Micro-Environment May Enhance the Bioactive Value of Lettuce

Horticulturae ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 32
Author(s):  
Chiara Amitrano ◽  
Youssef Rouphael ◽  
Stefania De Pascale ◽  
Veronica De Micco
Keyword(s):  
Vapor Pressure ◽  
Environmental Parameters ◽  
Controlled Environment ◽  
Mild Stress ◽  
Leafy Greens ◽  
Functional Quality ◽  
Protected Cultivation ◽  
Controlled Environment Agriculture ◽  
Number Of Leaves ◽  
Environment Chamber

Growing demand for horticultural products of accentuated sensory, nutritional, and functional quality traits has been driven by the turn observed in affluent societies toward a healthy and sustainable lifestyle relying principally on plant-based food. Growing plants under protected cultivation facilitates more precise and efficient modulation of the plant microenvironment, which is essential for improving vegetable quality. Among the environmental parameters that have been researched for optimization over the past, air relative humidity has always been in the background and it is still unclear if and how it can be modulated to improve plants’ quality. In this respect, two differentially pigmented (green and red) Salanova® cultivars (Lactuca sativa L. var. capitata) were grown under two different Vapor Pressure Deficits (VPDs; 0.69 and 1.76 kPa) in a controlled environment chamber in order to appraise possible changes in mineral and phytochemical composition and in antioxidant capacity. Growth and morpho-physiological parameters were also analyzed to better understand lettuce development and acclimation mechanisms under these two VPD regimes. Results showed that even though Salanova plants grown at low VPD (0.69 kPa) increased their biomass, area, number of leaves and enhanced Fv/Fm ratio, plants at high VPD increased the levels of phytochemicals, especially in the red cultivar. Based on these results, we have discussed the role of high VPD facilitated by controlled environment agriculture as a mild stress aimed to enhance the quality of leafy greens.

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