Changes in Tea Plant Secondary Metabolite Profiles as a Function of Leafhopper Density and Damage

Scott, Eric R.; Li, Xin; Wei, Ji‐Peng; Kfoury, Nicole; Morimoto, Joshua; Guo, Mingming; Agyei, Amma; Robbat, Albert; Ahmed, Selena; Cash, Sean B.; Griffin, Timothy S.; Stepp, John Richard; Wang, Han; Orians, Colin M.

doi:10.3389/fpls.2020.00636

Cited by 29 publications

(19 citation statements)

References 79 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For example, simulated and actual pest infestation was found to increase various coffee quality parameters (Vaddadi and Parvatam, 2015;Walker et al, 2018). This trend is line with previous research on the upregulation of secondary metabolite defense compounds with herbivory (Scott et al, 2020). As climate change impacts crop quality around the world, tolerance of specific herbivores in diversified agroecosystems such as through precision agriculture may be one solution for enhancing crop quality and mitigating the repercussion of climate change such as water stress (Ahmed et al, 2014a).…”

Section: Discussionsupporting

confidence: 84%

Climate Change and Coffee Quality: Systematic Review on the Effects of Environmental and Management Variation on Secondary Metabolites and Sensory Attributes of Coffea arabica and Coffea canephora

et al. 2021

Self Cite

View full text Add to dashboard Cite

Climate change is impacting crop performance and agricultural systems around the world with implications for farmers and consumers. We carried out a systematic review to synthesize evidence regarding the effects of environmental factors associated with climate change and management conditions associated with climate adaptation on the crop quality of a culturally-relevant perennial crop, coffee (Coffea arabica and Coffea canephora). Seventy-three articles were identified that addressed the study's research question including 42 articles on environmental factors, 20 articles on management conditions, and 11 articles on both. While variation was found between studies, findings highlight that coffee quality is vulnerable to changes in light exposure, altitude, water stress, temperature, carbon dioxide, and nutrient management. Both increases as well as decreases were found in secondary metabolites and sensory attributes that determine coffee quality in response to shifts in environmental and management conditions. The most consistent evidence identified through this systematic review includes the following two trends: (1) increased altitude is associated with improved sensory attributes of coffee and; (2) increased light exposure is associated with decreased sensory attributes of coffee. Research gaps were found regarding the effects of shifts in carbon dioxide, water stress, and temperature on the directionality (increase, decrease, or non-linear) of coffee quality and how this varies with location, elevation, and management conditions. This systematic review further identified the following research needs: (1) long-term studies that examine the interactive effects of multiple environmental factors and management conditions on coffee quality; (2) studies that examine the interaction between sensory attributes and secondary metabolites that determine coffee quality and; (3) studies on the feasibility of various climate-adaptation strategies for mitigating the effects of climate change on coffee quality. Evidence-based innovations are needed to mitigate climate impacts on coffee quality toward enhanced sustainability and resilience of the coffee sector from farm to cup.

show abstract

Section: Discussionsupporting

confidence: 84%

Climate Change and Coffee Quality: Systematic Review on the Effects of Environmental and Management Variation on Secondary Metabolites and Sensory Attributes of Coffea arabica and Coffea canephora

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Total concentration of secondary metabolites as well as the secondary metabolites constituents (metabolite profile) in tea leaves is influenced by plant genotype, environment, cultivation method, etc. (68). TP/AA is a quality evaluation index for green tea, as lower TP/AA indicates higher quality green tea (69).…”

Section: Discussionmentioning

confidence: 99%

Color Shade Nets Affect Plant Growth and Seasonal Leaf Quality of Camellia sinensis Grown in Mississippi, the United States

Zhang

et al. 2022

Front. Nutr.

View full text Add to dashboard Cite

Shading modifies the microenvironment and can provide plants with some protection from frequent heat, drought, frost, and hail induced by climate change and has the potential to improve plant growth, yield, and quality. Tea (Camellia sinensis) is an ancient plant originating from tropical and subtropical regions and prefers to grow in partial shade under the forest canopy. The emerging tea industry in the United States (US) requires research support on establishing tea fields in novel environmental conditions as well as on producing high-quality tea products. This study investigated the effects of black, blue, and red shade nets on tea plant growth and seasonal leaf qualities in the southeastern US with a humid subtropical climate. When compared to no-shade control, black, blue, and red shade nets increased plant growth index (PGI), net photosynthetic rate (Pn), and stomatal conductance (gs), decreased air and leaf surface temperatures in summer, and reduced cold damage in winter. No significant difference was found among the black, blue, and red shade nets on tea plant growth. Varying contents of total polyphenols, carbohydrates, free amino acids, L-theanine, gallic acid, caffeine, and catechins in fresh tea leaves were observed among different shade treatments and harvesting seasons. 69.58% of the variations were depicted in a biplot by principal component analysis. Red shade was considered helpful for improving green tea quality by increasing the content of L-theanine and free amino acids in tea leaves collected in spring and fall when compared to no-shade control.

show abstract

“…The hydrogen ions, thus produced, effectively deactivate the free radicals and other reactive oxygen species (Zuo et al 2018). The phytochemical composition of any plant in vivo may vary depending on several abiotic factors, like elevation, rainfall, drought, shade as well as the biotic components, such as microbes, insects and pests (Scott et al 2020). The above listed biotic and abiotic elements in combination with the highly variable global environment lead to inconsistent metabolite production reducing the avor quality of this valuable cash crop (Ahmed et al 2019).…”

Section: ; Khan and Mukhtar 2019mentioning

confidence: 99%

Androgenic haploid plant development via embryogenesis with simultaneous determination of bioactive metabolites in Cambod tea (Camellia assamica ssp. lasiocalyx)

Mishra

Bajpai

Chaturvedi

2022

Plant Cell Tiss Organ Cult

View full text Add to dashboard Cite

This pioneering work reports successful androgenic plant development via embryogenesis from microspore calluses in anther cultures and estimation of bioactive metabolites in in vitro regenerants and parent plant (control) of Cambod tea, Camellia assamica ssp. lasiocalyx (Planch MS) cultivar TV19. Anthers bearing microspores at early-to-late uni-nucleate stage were selected to initiate androgenesis. A pre-treatment of 5 0 C for ve days in the dark was most effective to initiate profusely growing white callusing from microspores within 10 weeks of culture on MS medium (6% sucrose) supplemented with high cytokinins/ auxin ratio maintained by benzyl adenine (BAP) and 2,4-dichlorophenxyacetic acid (2, 4-D). Nodular structures on the callus surface differentiated into embryos. Further developement of the embryos occurred on embryogenesis medium but, with ten times reduced concentration of growth regulators and additives. Germination of embryos into complete plantlets was achieved when major salts in medium were reduced to half MS (½ MS) and augmented with BAP, GA 3 and IBA along with glutamine and serine. Cytological examination of the root-tip cells revealed that regenerated plantlets were haploids (2n=x=15), which was further con rmed through ow cytometry. The hot-water extracts from in vitro haploid calluses, embryos and eld-grown donor plant were utilized for quanti cation of (+)-catechin, (-)-epicatechin, (-)-epigallocatechin gallate, caffeine and theophylline. Our ndings revealed that the metabolite pro le of in vitro regenerated haploid cultures is comparable to that of the mother plant, thereby presenting them as potential source for genome duplication and development of genetically stable homozygous pure breeding lines. Key MessageThis is rst report on haploids in out-breeding tree, Cambod tea. Its a signi cant achievement towards generating homozygous lines, which is impossible using conventional methods. Haploids showed consistent metabolite production.

show abstract

Changes in Tea Plant Secondary Metabolite Profiles as a Function of Leafhopper Density and Damage

Cited by 29 publications

References 79 publications

Climate Change and Coffee Quality: Systematic Review on the Effects of Environmental and Management Variation on Secondary Metabolites and Sensory Attributes of Coffea arabica and Coffea canephora

Climate Change and Coffee Quality: Systematic Review on the Effects of Environmental and Management Variation on Secondary Metabolites and Sensory Attributes of Coffea arabica and Coffea canephora

Color Shade Nets Affect Plant Growth and Seasonal Leaf Quality of Camellia sinensis Grown in Mississippi, the United States

Androgenic haploid plant development via embryogenesis with simultaneous determination of bioactive metabolites in Cambod tea (Camellia assamica ssp. lasiocalyx)

Contact Info

Product

Resources

About