Application of Temperature Stress to Roots of Spinach I. Effect of the Low Temperature Stress on Quality

Chadirin, Yudi; Hidaka, Kota; Takahashi, Taro; Sago, Yuki; Wajima, Takaaki; Kitano, Masaharu

doi:10.2525/ecb.49.133

Cited by 30 publications

(26 citation statements)

References 17 publications

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“…The leaf and stem DWs slightly decreased when short-term temperature stress was applied. This finding was consistent with the results of Chadirin et al [28,29], who reported that applying 7 days of 5 • C or 3 days of 30 • C RZT reduces the shoot DW of spinach. However, applying 7 days of 10 • C RZT and 6 days of 10 • C, 12 • C, or 15 • C RZT did not affect the DWs of red leaf lettuce [15] and red perilla [30] compared with 20 • C RZT, respectively.…”

Section: Plant Growthsupporting

confidence: 93%

Short-Term Root-Zone Temperature Treatment Enhanced the Accumulation of Secondary Metabolites of Hydroponic Coriander (Coriandrum sativum L.) Grown in a Plant Factory

Nguyen

Kagawa

et al. 2020

Agronomy

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The demand for high-nutrient and fresh vegetables, including coriander, has been growing rapidly. A plant factory with artificial lighting enables the application or suppression of stress conditions to plants for producing high-quality vegetables. This study aimed to determine a suitable root-zone temperature (RZT) treatment for enhancing the biomass and secondary metabolite content of hydroponic coriander plants. The combination of a mid-RZT (25 °C) pre-treatment with low (15 °C or 20 °C) or high (30 °C or 35 °C) RZT for a short period (3 or 6 days) was applied to the plants before harvesting. The fresh weights of the coriander plants were reduced under RZT stress. By contrast, the content of secondary metabolites, including ascorbic acid, carotenoids, phenolic compounds, chlorogenic acid, and the antioxidant capacity of the plants were enhanced by the combination of the lowest or highest RZT (15 °C or 35 °C) and the longer stress period (6 days). Growing coriander under an RZT of 30 °C for 6 days can produce large amounts of bioactive compounds and water, whereas growing coriander at an RZT of 15 °C for 6 days can produce high dry biomass and secondary metabolite content.

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Section: Plant Growthsupporting

confidence: 93%

Short-Term Root-Zone Temperature Treatment Enhanced the Accumulation of Secondary Metabolites of Hydroponic Coriander (Coriandrum sativum L.) Grown in a Plant Factory

Nguyen

Kagawa

et al. 2020

Agronomy

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“…Sun et al (2016) demonstrated the feasibility of cultivating hydroponic lettuce in high-temperature season through cooling of the nutrient solution. Similarly, the results obtained by other researchers (Zhang et al, 2008;Chadirin et al, 2011;Sakamoto & Suzuki, 2015a, 2015b showed the positive influence of root zone temperature on both the vegetative growth and biomass of the plant similar to the results of the present study.…”

Section: Shoot and Root Dry Weightsupporting

confidence: 92%

“…The results of the present study indicated significant (p < 0.05) effects in leaf area between plants of cooled RZT of 22 ºC, 25 ºC and 28 ºC with higher leaf area in comparison with non-cooled RZT 33 ºC (control) in both years 2016/2017 and 2017/2018. This could be due to the fact that RZT influences the vegetative growth and biomass of the plant (Zhang et al, 2008;Chadirin et al, 2011;Sakamoto & Suzuki, 2015a, 2015b and leaf area is indirectly associated with the rate of photosynthesis and amount of assimilation rate in the plants (Pang et al, 1997;Lu et al, 1994). Yan et al (2013) reported that strong interactions were observed between RZT and nutrients on leaf area and concluded that higher biomass and growth of cucumber seedlings were produced at RZT of 20 ºC.…”

Section: Leaf Area (Cm 2 )mentioning

confidence: 99%

Effect of Cooling Root-Zone Temperature on Growth, Yield and Nutrient Uptake in Cucumber Grown in Hydroponic System During Summer Season in Cooled Greenhouse

Al-Rawahy¹,

Al-Rawahy²,

Al-Mulla³

et al. 2018

JAS

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Optimum cool root zone temperature positively influences the production of greenhouse vegetables grown during summer/high temperature period under hydroponics system. Hence, the effect of root-zone temperature was investigated on the growth, yield and nutrient uptake of cucumber (Cucumis sativus L.) plants grown in pots filled with perlite medium under recirculating hydroponic system in greenhouse during summer period (June-August) in two consecutive years 2016/2017 and 2017/2018 using three cooling treatments-T1 (22 ºC), T2 (25 ºC) and T3 (28 ºC) and non-cooled treatment T4 (33 ºC) as control in Randomized Complete Design (RCD). All the treatments received the same nutrient concentrations. Significant (p < 0.05) differences were observed for all the characters viz. plant height, leaf number/m2, chlorophyll content, leaf area (cm2), fruit number /m2, yield (t/gh), fresh (g) and dry matter weight (g) of shoot and root at all cooled root-zone temperatures as compared to control in both the years. Plants at cooled root-zone temperature (RZT) of 22 ºC gave high number of fruits/m2 to the extent of 180 in 2016/2017 and 220 in 2017/2018 followed by that at 25 ºC (167, 221) and 28 ºC (178, 143) as compared to those in control (33 ºC) (101,133) in both the years. Similarly, highest fruit yields were found at cooled RZT of 22 ºC (5.0 t/gh) and 28 ºC (4.7 t/gh) in the first year and 22 ºC (6.1 t/gh) and 25 ºC (6.0 t/gh) in the second year. The plants at cooled RZT responded positively and significantly (p < 0.05) in the uptake of all nutrient elements in shoots and roots in comparison with those at non-cooled RZT in both years.

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“…Therefore, much research has been focused on cultivating high-quality spinach in plant factories year-round. Previous research has shown that cold stress to the root area of spinach has a positive effect on the nutritional quality, and produces a significant increase in beneficial substances (such as sugars, ascorbic acid, and Fe 2 ) and a decrease in harmful substances (such as NO3 and oxalic acid) (Chadirin et al, 2011a;2011b;2012). Furthermore, a recent study has indicated that 6 days is the optimal duration for root area chilling to produce high quality spinach, when the temperature of the nutrient solution is controlled at 10°C under plant factory conditions (Ito et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Quantitative Relationship of the Nutritional Quality of Spinach with Temperature and Duration in Root Area Chilling Treatment

Ito¹,

Shimizu

Hiroki

et al. 2015

Environmental Control in Biology

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Several studies have reported that the nutritional quality of spinach is enhanced by application of cold stress to the root area. However, the relationship of the nutritional value of spinach with the root area temperature and duration of root area chilling has not been investigated. Here, we examine the ascorbic acid, nitrate ion, and soluble solid content of spinach subjected to root area chilling in a nutrient solution for 2, 4, 5, 6, and 7 days at various temperatures (4, 6, 10, and 14°C). Under all temperature conditions, the nitrate ion concentration significantly decreased within 2 days of the onset of chilling. Ascorbic acid and soluble solid content showed similar trends; significant change in concentrations of both the compounds occurred after 4 days at 4°C, 5 days at 6°C, 6 days at 10°C, and 7 days at 14°C. On the basis of these results, we developed the relational expression for the chilling duration and solution temperature. The results of this study indicate that adjusting the chilling duration and solution temperature according to the relational expression would help plant factories produce high value-added spinach.

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Application of Temperature Stress to Roots of Spinach I. Effect of the Low Temperature Stress on Quality

Cited by 30 publications

References 17 publications

Short-Term Root-Zone Temperature Treatment Enhanced the Accumulation of Secondary Metabolites of Hydroponic Coriander (Coriandrum sativum L.) Grown in a Plant Factory

Short-Term Root-Zone Temperature Treatment Enhanced the Accumulation of Secondary Metabolites of Hydroponic Coriander (Coriandrum sativum L.) Grown in a Plant Factory

Effect of Cooling Root-Zone Temperature on Growth, Yield and Nutrient Uptake in Cucumber Grown in Hydroponic System During Summer Season in Cooled Greenhouse

Quantitative Relationship of the Nutritional Quality of Spinach with Temperature and Duration in Root Area Chilling Treatment

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