Pruned tea bushes secrete more root exudates to influence microbiological properties in soil

Pramanik, Prabhat; Phukan, Manabjyoti; Ghosh, Swayambhu; Goswami, Anup Jyoti

doi:10.1080/03650340.2017.1414945

Cited by 12 publications

(6 citation statements)

References 24 publications

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“…Soil acidification was reported to decrease the growth and N uptake of tea trees (Ruan et al, 2007). With intensified soil acidification, the losses of base cations (e.g., Ca 2+ , Mg 2+ , and K + ) and the accumulation of toxic aluminum (Al 3+ ) may reduce the buffering capacity and modify microbial activity and function, leading to imbalanced nutrient supply [15,31]. Acidic leachate resulted from large amounts of urea-N application may simultaneously induce acidification of the adjacent surface and underground water with consequences for environmental security and biodiversity of aquatic organisms.…”

Section: Soil Acidification With Increasing Rates Of Urea Applicationmentioning

confidence: 99%

Assessing the Effects of Nitrification Inhibitor DMPP on Acidification and Inorganic N Leaching Loss from Tea (Camellia sinensis L.) Cultivated Soils with Increasing Urea–N Rates

et al. 2021

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The effects of nitrification inhibitor in tea gardens with different urea–N rates have rarely been assessed. For eight months, a glasshouse experiment was conducted to investigate the effects of a nitrification inhibitor (3, 4–dimethylpyrazole phosphate, DMPP) on the changes of soil pH and inorganic N loss. Urea (0, 300, 500, and 800 kg N ha−1) with or without DMPP (1% of urea–N applied) were added to pots that hosted six plants that were three years old. Next, three leaching events were conducted with 600 mL of water after 7, 35, and 71 days of intervention while soil samples were collected to determine pH and inorganic N. Averaged across sampling dates, urea–N application at an increasing rate reduced soil pH with the lowest values at 800 kg urea–N ha−1. Adding DMPP increased soil pH up to a rate of 500 kg ha−1. Irrespective of the addition of DMPP, gradient urea–N application increased the leaching loss of inorganic N. On overage, DMPP increased soil pH and decreased leaching losses of total inorganic N, suggesting a higher soil N retention. Therefore, we believe that this increase in soil pH is associated with a relatively lower proton release from the reduced nitrification in the DMPP–receiving pots. This nitrification reduction also contributed to the N loss reduction (NO3−–N). Altogether, our results suggest that DMPP can reduce N leaching loss while maintaining the pH of tea–cultivated soils. Therefore, DMPP application has a significant potential for the sustainable N management of tea gardens.

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Section: Soil Acidification With Increasing Rates Of Urea Applicationmentioning

confidence: 99%

Assessing the Effects of Nitrification Inhibitor DMPP on Acidification and Inorganic N Leaching Loss from Tea (Camellia sinensis L.) Cultivated Soils with Increasing Urea–N Rates

et al. 2021

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“…The biological and physiological effects of pruning were reported previously . In addition, the interaction between pruning and the environment, pruning techniques and standards, pruning and tea quality have been investigated. , Among the characteristic compounds in tea leaves, catechins are the flavonoids most responsible for contributing to the quality of tea. In young tea leaves, catechins constitute 12–24% of the dry weight, and they can be classified into ester catechins, such as epigallocatechin gallate (EGCG) and epicatechin gallate (ECG), and non-ester catechins, such as epicatechin (EC) and epigallocatechin (EGC).…”

Section: Introductionmentioning

confidence: 99%

“…The biological and physiological effects of pruning were reported previously. 3 In addition, the interaction between pruning and the environment, 4 pruning techniques and standards, 5 pruning and tea quality have been investigated. 6,7 Among the characteristic compounds in tea leaves, catechins are the flavonoids most responsible for contributing to the quality of tea.…”

Section: ■ Introductionmentioning

confidence: 99%

Metabolic Flux Enhancement and Transcriptomic Analysis Displayed the Changes of Catechins Following Long-Term Pruning in Tea Trees (Camellia sinensis)

Sun

Zhang²,

et al. 2018

J. Agric. Food Chem.

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The tea tree is a perennial woody plant, and pruning is one of the most crucial cultivation measurements for tea plantation management. To date, the relationship between long-term pruning and metabolic flux enhancement in tea trees has not been studied. In this research, 11-year-old pruned tea trees from four different cultivars were randomly selected for transcriptome analysis and characteristic secondary metabolite analysis together with controls. The findings revealed that epigallocatechin gallate (EGCG) accumulation in pruned tea trees was significantly higher than that in unpruned tea trees. SCPL1A expression (encoding a class of serine carboxypeptidase), which has been reported to have a catalytic ability during EGCG biosynthesis, together with LAR, encoding leucoanthocyanidin reductase, was upregulated in the pruned tea trees. Moreover, metabolic flux enhancement and transcriptome analysis revealed low EGCG accumulation in the leaves of unpruned tea trees. Because of the bitter and astringent taste of EGCG, these results provide a certain understanding to the lower bitterness and astringency in teas from "ancient tea trees", growing in the wild with no trimming, than teas produced from pruned plantation trees.

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“…Guo et al have suggested that long-term tea cultivation results in the accumulation of acidic compounds in the rhizosphere soil, leading to soil acidification, nutrient depletion, and a significant decrease in soil aggregate stability [16]. Additionally, the accumulation of secondary metabolites and above-ground litter in tea trees is able to cause autotoxicity, which inhibits tea tree growth [17,18]. In addition to rhizosphere soil, the microecological conditions of the surrounding soil also have a profound impact on the productivity of the plantations.…”

Section: Introductionmentioning

confidence: 99%

Impact of Tea Tree Cultivation on Soil Microbiota, Soil Organic Matter, and Nitrogen Cycling in Mountainous Plantations

Shao,

Li,

et al. 2024

Agronomy

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This study focused on examining the early stages of tea cultivation (1, 3, and 5 years) in mountainous tea plantations. It specifically aimed to investigate the changes in soil micro-ecology at different locations (inter-row, terrace surfaces, and terrace walls). It was revealed that as tea tree cultivation progressed over the years, bacterial diversity and co-occurrence networks annually decreased in different locations. The results of soil physicochemical index analysis showed that the soil’s available nutrients and the activities of cellulase and protease increased. Furthermore, the amplitude of variation of these indexes in the inter-row soil was significantly higher than that on the terrace surfaces and the terrace walls (p < 0.05). Alterations occurred in the soil microbial community structure, with an enrichment of bacterial genera such as Sinomonas, Granulicella, and Sphingomonas, as well as fungal genera such as Trichoderma, Penicillium, and Talaromyces; an increase in the proportion of plant pathogenic fungi (Cladosporium, Fusarium, and Curvularia) was observed in the inter-row soil. The results of soil microbial function prediction showed that nitrification and nitrogen fixation decreased, but denitrification increased (p < 0.05). In conclusion, cultivating tea trees in mountainous terraced plantations significantly impacted the soil microbial community, accelerated the metabolism of soil organic matter, disrupted soil nitrogen cycling functions, and increased the presence of plant pathogenic fungal pathogens. Moreover, the changes in the structure and functions of the soil microbial community demonstrate a spatial distance effect across different terrace locations.

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Pruned tea bushes secrete more root exudates to influence microbiological properties in soil

Cited by 12 publications

References 24 publications

Assessing the Effects of Nitrification Inhibitor DMPP on Acidification and Inorganic N Leaching Loss from Tea (Camellia sinensis L.) Cultivated Soils with Increasing Urea–N Rates

Assessing the Effects of Nitrification Inhibitor DMPP on Acidification and Inorganic N Leaching Loss from Tea (Camellia sinensis L.) Cultivated Soils with Increasing Urea–N Rates

Metabolic Flux Enhancement and Transcriptomic Analysis Displayed the Changes of Catechins Following Long-Term Pruning in Tea Trees (Camellia sinensis)

Impact of Tea Tree Cultivation on Soil Microbiota, Soil Organic Matter, and Nitrogen Cycling in Mountainous Plantations

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