Effects of nitrate deficiency on nitrate assimilation and chlorophyll synthesis of detached apple leaves

Wen, Binbin; Li, Chen; Fu, Xiling; Li, Dongmei; Li, Ling; Chen, Xiude; H, Wu; Cui, Xiaowen; Zhang, Xinhao; Shen, Hongyan; Zhang, Wenqian; Xiao, Wei; Gao, Dongsheng

doi:10.1016/j.plaphy.2019.07.007

Cited by 84 publications

(42 citation statements)

References 36 publications

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“…The lack of the blue light effect on nitrate composition is in accordance with the observation that chlorophyll levels in all four Brassicaceae microgreens were not impacted by the proportion of blue light in our study. This association is likely because nitrate availability in leaves affects the biosynthesis of chlorophyll and its precursors (Wen et al, 2019). Previous research indicated that ascorbate:nitrate ratios >1 occur in some greenhouse-grown vegetables, and this comparison is postulated to serve as a measure of the nutritional value of horticultural products (Pokluda, 2006).…”

Section: Discussionmentioning

confidence: 99%

The Proportion of Blue Light from Light-emitting Diodes Alters Microgreen Phytochemical Profiles in a Species-specific Manner

Ying¹,

Jones-Baumgardt²,

Zheng³

et al. 2021

horts

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Microgreens are specialty vegetables that contain human health-promoting phytochemicals. Typically, microgreens are cultivated in controlled environments under red and blue light-emitting diodes (LEDs). However, the impact of varying the proportions of these light qualities on the composition of diverse phytochemicals in indoor-grown microgreens is unclear. To address this problem, the levels of chlorophylls, carotenoids, ascorbates, phenolics, anthocyanins, and nitrate were examined in arugula (Eruca sativa L.), ‘Red Russian’ kale [Brassica napus L. subsp. napus var. pabularia (DC.) Alef.], ‘Mizuna’ mustard (Brassica juncea L.), and red cabbage (Brassica oleracea L. var. capitata f. rubra) microgreens following cultivation under LEDs supplying varying proportions of blue light (5% to 30%) and red light (70% to 95%). Varying the proportion of blue light did not affect the extractable levels of total chlorophyll, total carotenoids, or nitrate in all four microgreen species. Generally, the levels of reduced and total ascorbate were greatest in arugula, kale, and mustard microgreens at 20% blue light, and a minor decrease was apparent at 30% blue light. These metabolite profiles were not impacted by the blue light percentage in red cabbage. Kale and mustard accumulated more total phenolics at 30% blue light than all other blue light regimens; however, this phytochemical attribute was unaffected in arugula and red cabbage. The total anthocyanin concentration increased proportionally with the percentage of supplied blue light up to 30% in all microgreens, with the exception of mustard. Our research showed that 20% blue light supplied from LED arrays is ideal for achieving optimal levels of both reduced and total ascorbate in all microgreens except red cabbage, and that 30% blue light promotes the greatest accumulation of total anthocyanin in indoor-grown Brassicaceae microgreens, with the exception of mustard.

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Section: Discussionmentioning

confidence: 99%

The Proportion of Blue Light from Light-emitting Diodes Alters Microgreen Phytochemical Profiles in a Species-specific Manner

Ying¹,

Jones-Baumgardt²,

Zheng³

et al. 2021

horts

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“…Dalam penelitian ini, tidak ada perbedaan komposisi nutrisi AB Mix yang digunakan selama kultivasi bayam maupun selada pada ketiga jenis media tanam. Kadar klorofil dapat berbeda secara signifikan apabila komposisi nutrisi hidroponik dijadikan sebagai parameter atau peubah bebas, terutama unsur N (nitrogen) (Warganegara et al, 2015;Wen et al, 2019), S (sulfur) (Skudra & Ruza, 2017), Fe (besi), Zn (seng), dan Mn (mangan) (Roosta et al, 2018).…”

Section: Hasil Dan Pembahasanunclassified

Pengaruh Media Tanam Hidroponik terhadap Pertumbuhan Bayam (Amaranthus sp.) dan Selada (Lactuca sativa)

Warjoto

Barus

Mulyawan

2020

JPPT

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As the human population rises, the demand for high nutritional foods, such as green vegetables, also increases. However, agricultural land, especially in urban areas, is increasingly narrowing. Hydroponics can be one of the solutions to answer this problem. In addition to complete nutrition, hydroponic plants also require appropriate media for root attachments, water absorption, and aeration. However, no studies have compared the growth of hydroponic plants using rockwool and sponge as affordable growing media. Therefore, this study aimed to determine the effect of local rockwool, imported rockwool, and sponge as growing media on the growth of spinach (Amaranthus sp.) and green lettuce (Lactuca sativa) using Deep Flow Technique (DFT). This study used a Completely Randomized Design with three treatment groups, i.e., three different growing media, for spinach and lettuce. At the harvest period, the number of leaves on each plant was counted, the crown fresh-weight was balanced, and the chlorophyll content was determined. Plant height was also measured for spinach. The results showed no significant differences in all observed parameters except for the crown fresh-weight of the lettuce. The crown fresh-weight of the lettuce grown on sponge media was found to be the lowest significantly (81.47 ± 9.50 g) among all treatment groups. Other hydroponic growing media’s influences can be investigated for further research, with additional growth parameters such as crown dry-weight, root fresh- and dry-weight, as well as the determination of plant phytochemical contents. Moreover, the composition of nutrients can also be further examined to reveal the type of growing media and nutritional formulations that are most optimum for hydroponic spinach and lettuce growth.

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“…Most of the studies focused on chlorophyll synthesis and degradation in relation to tea leaf color [41,42]. The changes in expression of genes involved in chlorophyll synthesis and degradation ( Figure 1B,C) indicated that the increase in chlorophyll content in fresh tea leaves under long-term N application might be due to the activation of genes involved in its synthesis [43,44]. The accumulation of chlorophyll in plants is a dynamic process, and the balance of its synthesis and degradation is complex.…”

Section: Effect Of Long-term Nitrogen Application On Chlorophyll Syntmentioning

confidence: 99%

Effects of Long-Term Nitrogen Fertilization on the Formation of Metabolites Related to Tea Quality in Subtropical China

Chen

Wang

et al. 2021

Metabolites

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As a main agronomic intervention in tea cultivation, nitrogen (N) application is useful to improve tea yield and quality. However, the effects of N application on the formation of tea quality-related metabolites have not been fully studied, especially in long-term field trials. In this study, a 10-year field experiment was conducted to investigate the effect of long-term N application treatments on tea quality-related metabolites, their precursors, and related gene expression. Long-term N application up-regulated the expression of key genes for chlorophyll synthesis and promoted its synthesis, thus increasing tea yield. It also significantly increased the contents of total free amino acids, especially l-theanine, in fresh tea leaves, while decreasing the catechin content, which is conducive to enhancing tea liquor freshness. However, long-term N application significantly reduced the contents of benzyl alcohol and 2-phenylethanol in fresh tea leaves, and also reduced (E)-nerolidol and indole in withered leaves, which were not conducive to the formation of floral and fruity aroma compounds. In general, an appropriate amount of N fertilizer (225 kg/hm2) balanced tea yield and quality. These results not only provide essential information on how N application affects tea quality, but also provide detailed experimental data for field fertilization.

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Effects of nitrate deficiency on nitrate assimilation and chlorophyll synthesis of detached apple leaves

Cited by 84 publications

References 36 publications

The Proportion of Blue Light from Light-emitting Diodes Alters Microgreen Phytochemical Profiles in a Species-specific Manner

The Proportion of Blue Light from Light-emitting Diodes Alters Microgreen Phytochemical Profiles in a Species-specific Manner

Pengaruh Media Tanam Hidroponik terhadap Pertumbuhan Bayam (Amaranthus sp.) dan Selada (Lactuca sativa)

Effects of Long-Term Nitrogen Fertilization on the Formation of Metabolites Related to Tea Quality in Subtropical China

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