Electrical conductivity of nutrient solution influenced photosynthesis, quality, and antioxidant enzyme activity of pakchoi (Brassica campestris L. ssp. Chinensis) in a hydroponic system

Ding, Xinyu; Jiang, Yuping; Zhao, Hong; Guo, Doudou; He, Lizhong; Liu, Fu-Guang; Zhou, Qiang; Nandwani, Dilip; Hui, Dafeng; Yu, Jiangnan

doi:10.1371/journal.pone.0202090

Cited by 147 publications

(133 citation statements)

References 56 publications

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“…The nitrate content in lettuce was linearly positively associated with NSC level (Fig. 1B), it was increased linearly in lettuce by increasing N in nutrient solutions 15 , and was lower in medium EC (1.8-2.4) treatment in comparison with high or low EC 33 . It was possible that higher light intensity could promote nitrate accumulation through increasing photosynthetic production 34 .…”

Section: Discussionmentioning

confidence: 93%

Nutritional quality, mineral and antioxidant content in lettuce affected by interaction of light intensity and nutrient solution concentration

Song

Huang

Hao

et al. 2020

Sci Rep

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Light and nutrient are important factors for vegetable production in plant factory or greenhouse. The total 12 treatments which contained the combination of four light intensity (150, 250, 350 and 450 μmol · m −2 · s −1 ) and three nutrient solution concentration (NSC) (1/4, 1/2, 3/4 strength NSC) were established for investigation of lettuce growth and quality in a growth chamber. The combination of light intensity and NSC exhibited significant effects on photosynthetic pigment, nutritional quality, mineral content and antioxidant capacity. That a higher light intensity were readily accessible to higher chlorophyll a/b showed in lettuce of treatment of 350 μmol · m −2 · s −1 × 3/4NSC and 450 μmol · m −2 · s −1 × 1/4NSC. Lower total N contents, higher content of soluble protein, vitamin C, soluble sugar and free amino acid exhibited in lettuce under treatment of 250 and 350 μmol · m −2 · s −1 × 1/4NSC or 3/4NSC. With increasing NSC and LED irradiance, the content of total P and K in lettuce increased and decreased, respectively. The highest and lowest total Ca content were found in treatment of 150 μmol · m −2 · s −1 × 1/4NSC and 450 μmol · m −2 · s −1 × 1/4NSC, respectively, and higher content of total Mg and Zn was observed under 250 μmol m −2 s −1 × 1/4NSC and 150 μmol · m −2 · s −1 × 3/4NSC, respectively. The antioxidant contents generally decreased with increasing NSC level. The higher antioxidant content and capacity occurred in lettuce of 350 μmol · m −2 · s −1 × 1/4NSC treatment. The interaction of 350 μmol · m −2 · s −1 × 1/4NSC might be the optimal condition for lettuce growth in plant factory.Lettuce (Lactuca sativa L.) is one of the most important vegetable in the world, which is main crop in plant factory. The secondary metabolite in vegetable plays key roles for human body health, such as phenolic compound, vitamin A and C, and carotenoid. These compounds have a function on nutrition and health care 1 , which could enhance anti-oxidation ability of human body, and the suppression of inflammatory disease and cancer 2,3 . Nutritional quality of lettuce is affected by light and nutrient solution in plant factory. Light (including light quality, intensity and photoperiod) plays a crucial role in improvement of plant nutrition quality 4,5 . The proper ratio of red and blue light is essential for plant growth and development 6 . Light intensity not only positively regulates lettuce biomass and morphology, but also nutrition quality and activities of anti-oxidative enzymes 7,8 . The content of soluble sugars and ascorbic acid in lettuce increases with increasing light intensity 9 . Different light intensity is required by different plant for nutritional quality and growth. The highest content of lutein, ß-carotene and chlorophyll in leave shows at 335 μmol · m −2 · s −1 for kale, but 200 μmol · m −2 · s −1 for spinach 10 . In ten leafy vegetables (chicory, green lettuce, lamb's lettuce, mizuna, red chard, red lettuce, rocket, spinach, swiss chard, and tatsoi), higher leaf dry matter, content of protein, K,...

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Section: Discussionmentioning

confidence: 93%

Nutritional quality, mineral and antioxidant content in lettuce affected by interaction of light intensity and nutrient solution concentration

Song

Huang

Hao

et al. 2020

Sci Rep

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“…Higher rates of EC of nutrient or fertilizer solutions are proven with the stimulation of favourable agronomic traits, such as increase in nutritional quality, colour gradient and quality of tomato fruits [36,37]. However, solutions outside the optimum EC had an inhibitory effect on plant growth activities [38]. A nutrient solution within optimum EC was found optimal for the growth stimulation of lettuce in glasshouse conditions [39].…”

Section: Discussionmentioning

confidence: 99%

Sustainable Agronomic Strategies for Enhancing the Yield and Nutritional Quality of Wild Tomato, Solanum Lycopersicum (l) Var Cerasiforme Mill

et al. 2019

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Urbanization and global climate change have constrained plant development and yield. Utilization of wild gene pool, together with the application of sustainable and eco-friendly agronomic crop improvement strategies, is being focused on to tackle mounting food insecurity issues. In this aspect, the green seaweed, Ulva flexuosa, was assessed for plant biostimulant potential on cherry tomato, in terms of seed priming effects, nutrition and yield. SEM-EDX analysis of U. flexuosa presented the occurrence of cell wall elements (O, Na, Mg, S, Cl, K and Ca). The phytochemical analyses of liquid seaweed extract (EF-LSE) revealed the presence of carbohydrates, protein, phenols, flavonoids, saponins, tannins and coumarins. The EF-LSEs were found to stimulate seed germination in a dose-dependent manner, recording higher seed germination, and biomass and growth parameters. The seedlings of treated seeds altered the biochemical profile of the fruit, in terms of TSS (93%), phenol (92%), lycopene (12%) and ascorbic acid (86.8%). The EF-LSEs positively influenced fruit yield (97%). Henceforth, this investigation brings to light the plant biostimulant potential of the under-utilized seaweed source, U. flexuosa, to be useful as a bio fertilizer in agronomic fields for a cumulative enhancement of crop vigour as well as yields to meet the growing food demands.

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“…The increase in the root mass and water absorbed in afforestation sites leads to leaching of soluble salts in the rhizosphere (Abrol et al 1988). In terms of soil amelioration, the reduction of EC 1:5 due to vegetation establishment could solve the problem of higher electrical conductivity that hinders nutrient uptake by increasing the osmotic pressure of the nutrient solution (Ding et al 2018). When referring to the results of regression analysis, the restoration span and EC 1:5 showed a strong negative correlation, which indicates that there is a difference in soil amelioration effect depending on the restoration span.…”

Section: Linkage Of Soil Properties and Biological Activities Followimentioning

confidence: 98%

Changes in basic soil properties and enzyme activities along an afforestation series on the dry Aral Sea Bed, Kazakhstan

Chang

Han

et al. 2019

Forest Science and Technology

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Electrical conductivity of nutrient solution influenced photosynthesis, quality, and antioxidant enzyme activity of pakchoi (Brassica campestris L. ssp. Chinensis) in a hydroponic system

Cited by 147 publications

References 56 publications

Nutritional quality, mineral and antioxidant content in lettuce affected by interaction of light intensity and nutrient solution concentration

Nutritional quality, mineral and antioxidant content in lettuce affected by interaction of light intensity and nutrient solution concentration

Sustainable Agronomic Strategies for Enhancing the Yield and Nutritional Quality of Wild Tomato, Solanum Lycopersicum (l) Var Cerasiforme Mill

Changes in basic soil properties and enzyme activities along an afforestation series on the dry Aral Sea Bed, Kazakhstan

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