Characterization of some Vitis vinifera L. Indigenous Varieties by Analysis of Leaf Photosynthetic Pigments

Filimon, V. R.; Filimon, Roxana; Rotaru, Liliana

doi:10.15835/buasvmcn-hort:10278

Cited by 1 publication

(2 citation statements)

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“…Compared to spectrophotometry, CCM-200 plus affords fast, reliable chlorophyll content measurements, although it does not provide details regarding chlorophyll components and ratios (Filimon et al, 2014). According to Van den Berg and Perkins (2004), small differences in the structures of the two main chlorophylls (a and b) produce differences in their absorption maxima, which help in their individual assay.…”

Section: Chlorophyll Content Indexmentioning

confidence: 99%

“…Previous research conducted on different species showed significant linear correlation of total chlorophyll (by spectrophotometry) and chlorophyll content index (CCI) values, although with large differences in terms of data correlation (Van den Berg & Perkins, 2004;Ghasemi et al, 2011;Khaleghi et al, 2012;Callejas et al, 2013). The lack of a more consistent relationship between total chlorophyll by extraction and CCI values (non-destructive) for different V. vinifera L. genotypes and in different phenophases limits the potential use of the CCM-200 plus instrument for this specie (Filimon et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Quantitative Investigation of Leaf Photosynthetic Pigments during Annual Biological Cycle of Vitis vinifera L. Table Grape Cultivars

Filimon¹,

Rotaru²,

Filimon

2016

SAJEV

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Variations in chlorophyll a/b and chlorophyll/carotenoid ratios are indicators of senescence, stress or damage to the photosynthetic apparatus and affect the normal course of plant biological processes. The aim of this work was to investigate the chlorophyll (a and b) and carotenoid content and ratios in the leaves of four Vitis vinifera L. table grape cultivars in the main phenophases of the annual biological cycle. During the annual cycle, the moisture content of the leaves decreased significantly (up to 21%), along with a reduction in leaf area and perimeter. Chlorophyll a and b showed a continuous accumulation until grape véraison, with lower values of the Chl a/b ratio at the beginning of the vegetative period. Carotenoids continued their biosynthesis until grape ripening (for another 30 days), at which stage there was a significant decrease in the chlorophyll/carotenoid ratio (2.62 ± 0.31). At véraison, peroxidase had the most intense activity (0.20 to 0.51 U/mg), possibly because of involvement in chlorophyll degradation, while total phenolic content started to decrease. Grape véraison could be regarded as the starting point of foliage senescence. Moreover, the relationship between total chlorophyll (by extraction) and chlorophyll content index (non-destructive method) was very significant (R 2 = 0.92). These results contribute to a better understanding of foliar pigment dynamics and the timing of their decline in order to define the behaviour of table grape cultivars during the annual biological cycle. INTRODUCTIONThe annual life cycle of grapevines is a process that takes place in the vineyard each year, beginning with bud burst in the spring and culminating with leaf fall in autumn, followed by winter dormancy (Creasy & Creasy, 2009). The annual life cycle comprises all morphological and biological changes with a periodic character through which the grapevine passes in a calendar year. These changes are called phenological stages (phenophases) and have a specific starting and ending time and a hereditary character (Wang et al., 2014). The occurrence and duration of phenological phases is influenced by climatic factors, and it should be noted that, under the same climatic conditions, the annual life cycle varies by cultivar (Jones & Davis, 2000). In the temperate continental climate, the annual cycle of grapevines lasts about 160 to 220 days.Chlorophylls (Chl) are probably the most important organic compounds on earth, as they are required for photosynthesis (Davies, 2004;Willows, 2004). Photosynthesis in plants is dependent upon capturing light energy in the pigment chlorophyll, and in particular chlorophyll a (Blankenship, 2014). Photosynthetic activity is a very intense process (5 to 11 μmol CO 2 /m 2 /s) that provides all the organic material needed for the growth and life activity of the plant (Popescu & Popescu, 2014). This is why photosynthesising cells have to contain large amounts of assimilatory pigments (up to 5% of total dry solids; Rabinowitch & Govindjee, 1969). In most species, the photos...

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Section: Chlorophyll Content Indexmentioning

confidence: 99%