PrepareĪlthough many cabbage varieties do grow in summer, they are generally at their best in spring, autumn and winter. Many are ideal for growing in containers as well as the garden. Over the years bigger, smaller, sweeter and coloured cabbages have been developed. doi: 10.3389/ with goodness, cabbages come in plenty of different shapes and sizes. Plant factories are heating up: hunting for the best combination of light intensity, air temperature and root-zone temperature in lettuce production. A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding. Genotype-dependent tipburn severity during lettuce hydroponic culture is associated with altered nutrient leaf content. Journal of the Science of Food and Agriculture. Effects of light quality on the accumulation of phytochemicals in vegetables produced in controlled environments: a review. Reducing the evaporative demand improves photosynthesis and water use efficiency of indoor cultivated lettuce. Values are means ± standard error ( n, sample replicates), different letters indicate significant differences among different treatments and cultivars at a significance level of 0.05 using Duncan’s multiple range tests.Īmitrano C, Rouphael Y, Pannico A, De Pascale S, De Micco V. LH, low relative air humidity HH, high relative air humidity. (I) Vitamin C contents of plants under high relative air humidity conditions on 35 days after sowing. (H) Soluble sugar contents of plants under high relative air humidity conditions on 35 days after sowing. (G) Soluble protein contents of plants under high relative air humidity conditions on 35 days after sowing. (F) Shoot fresh weight of plants under high relative air humidity conditions on 35 days after sowing. (E) Dry weight of whole plant on 14 days after sowing ( n = 15). (D) Fresh weight of whole plant on 14 days after sowing ( n = 15). (C) Leaf burn incidence on 14 days after sowing ( n = 45). (B) Plant phenotype under high relative air humidity conditions on 35 days after sowing. (A) Plant phenotype under low and high relative air humidity conditions on 14 days after sowing. Taken together, high canopy RH may favor maintaining leaf water potential and improving photosynthesis performance, jointly regulating leaf burn incidence and plant growth.įlowering Chinese cabbage Leaf burn Leaf water potential Light condition Plant factory Relative air humidity. Specifically, the low RH-treated seedlings occurred varying degree of leaf burn symptoms, along with rapidly decreased water potential in leaves, while the high RH treatment significantly lessened the drop in leaf water potential, together with increased photosynthetic pigment contents, net photosynthetic rate, stomatal conductance and transpiration rate, decreased leaf stomatal aperture and density, and thus reduced the incidence of leaf burn in 'Sijiu' and 'Chixin', from 28.89% and 18.52% to zero, respectively. Interestingly, the occurrence of leaf burn was completely restrained by an increased canopy RH from 70% to 90%. We discovered that changing light conditions did not fully suppress leaf burn occurrence in the cultivar 'Sijiu', though lower light intensity and shorter photoperiod partly did. Two different light intensities (150 and 105 µmol m -2 s -1 photosynthetic photon flux density (PPFD)), three photoperiod conditions (12, 10 and 8 h d -1) and two canopy relative air humidity (RH) (70% and 90% RH) were set to evaluate the suppression effects on leaf burn occurrence in two commercial flowering Chinese cabbage cultivars ('Sijiu' and 'Chixin'), the special cruciferous vegetable in South China. It occurred more commonly and severely in cruciferous leafy vegetables. We defined this new physiological disorder as "leaf burn". ![]() A total of 20 vegetable crops, belonging to 14 species and 4 families, unexpectedly exhibited different degrees of leaf margin necrosis in lower leaves firstly, then the upper leaves gradually. In the present study, thirty types of common vegetable crops from 25 species and eight families, were grown in a multi-layer hydroponic system in a closed-type plant factory to evaluate the adaptive performance. Plant factories that ensure the annual production of vegetable crops have sparked much attention.
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