The influence of some environmental factors on cytological and biometric parameters and chlorophyll content of Deschampsia antarctica Desv. in the maritime Antarctic

Parnikoza, Іvan; Loro, P.; Miryuta, N. Yu.; Кунах, В. А.; Kozeretska, I. A.

doi:10.3103/s0095452711030078

Cited by 8 publications

(4 citation statements)

References 17 publications

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“…In this study, the broccoli leaf and floret tissues contained about 5–7 times of chlorophyll a than of chlorophyll b , which is higher than the previous data evaluated with four broccoli varieties [ 32 ]. The different result may reflect the ratio of broccoli flower buds and stems included in sampling protocols, as well as differences in environmental conditions between the two studies [ 33 , 34 ].…”

Section: Resultsmentioning

confidence: 99%

Comparative Phytonutrient Analysis of Broccoli By-Products: The Potentials for Broccoli By-Product Utilization

et al. 2018

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The phytonutrient concentrations of broccoli (Brassica oleracea var. italica) florets, stems, and leaves were compared to evaluate the value of stem and leaf by-products as a source of valuable nutrients. Primary metabolites, including amino acids, organic acids, and sugars, as well as glucosinolates, carotenoids, chlorophylls, vitamins E and K, essential mineral elements, total phenolic content, antioxidant activity, and expression of glucosinolate biosynthesis and hydrolysis genes were quantified from the different broccoli tissues. Broccoli florets had higher concentrations of amino acids, glucoraphanin, and neoglucobrassicin compared to other tissues, whereas leaves were higher in carotenoids, chlorophylls, vitamins E and K, total phenolic content, and antioxidant activity. Leaves were also good sources of calcium and manganese compared to other tissues. Stems had the lowest nitrile formation from glucosinolate. Each tissue exhibited specific core gene expression profiles supporting glucosinolate metabolism, with different gene homologs expressed in florets, stems, and leaves, which suggests that tissue-specific pathways function to support primary and secondary metabolic pathways in broccoli. This comprehensive nutrient and bioactive compound profile represents a useful resource for the evaluation of broccoli by-product utilization in the human diet, and as feedstocks for bioactive compounds for industry.

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Section: Resultsmentioning

confidence: 99%

Comparative Phytonutrient Analysis of Broccoli By-Products: The Potentials for Broccoli By-Product Utilization

et al. 2018

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“…They also occur in coastal areas along the length of the western Antarctic Peninsula, reaching northern Alexander Island (69°S), as well as in southern and Andean South America ( Convey et al , 2011 ). The very limited number of vascular plant species in the maritime Antarctic has led to them being of scientific interest in the context of their colonization of the region ( Smith, 2003 ; Parnikoza et al , 2007 ; 2011 ). To date, no adaptations exclusive to the Antarctic have been discovered in either species ( Mantovani and Vieira, 2000 ; Barcikowski et al , 2001 ; Gielwanowska and Szczuka, 2005 ).…”

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confidence: 99%

Antarctic Hairgrass Rhizosphere Microbiomes: Microscale Effects Shape Diversity, Structure, and Function

et al. 2022

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The rhizosphere microbiome of the native Antarctic hairgrass Deschampsia antarctica from the central maritime Antarctic was investigated using 16S RNA metagenomics and compared to those of the second native Antarctic plant Colobanthus quitensis and closely related temperate D. cespitosa . The rhizosphere microbial communities of D. antarctica and D. cespitosa had high taxon richness, while that of C. quitensis had markedly lower diversity. The majority of bacteria in the rhizosphere communities of the hairgrass were affiliated to Proteobacteria , Bacteroidetes , and Actinobacteria . The rhizosphere of C. quitensis was dominated by Actinobacteria . All microbial communities included high proportions of unique amplicon sequence variants (ASVs) and there was high heterogeneity between samples at the ASV level. The soil parameters examined did not explain this heterogeneity. Bacteria belonging to Actinobacteria , Bacteroidetes , and Proteobacteria were sensitive to fluctuations in the soil surface temperature. The values of the United Soil Surface Temperature Influence Index (UTII, I t i ) showed that variations in most microbial communities from Galindez Island were associated with microscale variations in temperature. Metabolic predictions in silico using PICRUSt 2.0, based on the taxonomically affiliated part of the microbiomes, showed similarities with the rhizosphere community of D. antarctica in terms of the predicted functional repertoire. The results obtained indicate that these communities are involved in the primary processes of soil development (particularly the degradation of lignin and lignin-derived compounds) in the central maritime Antarctic and may be beneficial for the growth of Antarctic vascular plants. However, due to the limitations associated with interpreting PICRUSt 2.0 outputs, these predictions need to be verified experimentally.

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“…Deschampsia antarctica È. Desv. has already been observed as an indicator on the Galindez Island (Parnikoza et al 2011(Parnikoza et al , 2018. The other studies evidence that moss banks can also be considered in this role (Kanda and Inoue 1994;Yu et al 2016;).…”

Section: Introductionmentioning

confidence: 87%

Moss bank composition on Galindez Island (Argentine Islands, maritime Antarctic)

Wierzgoń,

Ivanets,

Prekrasna-Kviatkovska

et al. 2023

Polar Biol

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Tall moss turf subformation, whose developed forms are called moss banks (MB), play an important role in the structure of vegetation communities in the maritime Antarctic. In the present research, we studied the spatial distribution, moss banks thickness, area, species amount, dependence between these parameters, and species composition of the 44 MB on Galindez Island, Argentine Islands, Graham Coast.To select indicators for the monitoring of communities affected by climate change and biotic disturbance we compared the key parameters of the largest moss bank on Galindez Island (Smith moss bank) with measurements received for this moss bank 46 years ago. Galindez moss banks' bryophyte ora included 13 species of mosses and three species of liverworts. There was no correlation between the species richness and the area of MB, but the species richness positively correlated with moss banks' thickness. We supposed species diversity of MB depended presumably on the age of the moss bank and microconditions than on the area. Abundance of some moss species correlated with moss bank thickness. A comparison of results obtained in this study and in 1976, revealed an increase in the amount of brownand black-coloured curtains of Polytrichum strictum, no signi cant changes in the ratio of Chorisodontium aciphyllum and a decrease in the lichen incrustation. These results show that the ratio of P. strictum's colour morphotypes, C. aciphyllum and liverworts' abundance can be used to evaluate the condition of MB in the long-term monitoring.

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The influence of some environmental factors on cytological and biometric parameters and chlorophyll content of Deschampsia antarctica Desv. in the maritime Antarctic

Cited by 8 publications

References 17 publications

Comparative Phytonutrient Analysis of Broccoli By-Products: The Potentials for Broccoli By-Product Utilization

Comparative Phytonutrient Analysis of Broccoli By-Products: The Potentials for Broccoli By-Product Utilization

Antarctic Hairgrass Rhizosphere Microbiomes: Microscale Effects Shape Diversity, Structure, and Function

Moss bank composition on Galindez Island (Argentine Islands, maritime Antarctic)

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