Azoto trąšų poveikis skirtingų žieminių kviečių veislių fotosintetiniams rodikliams

Juchnevičienė, Aistė; Vagusevičienė, Ilona; Kaminskaitė, Aušra; Brazaitytė, A.; Duchovskis, Pavelas

doi:10.6001/zemesukiomokslai.v22i1.3062

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…Nitrogen is also directly responsible for chlorophyll production (Toth et al, 2002, Kim et al, 2002. Thus, decreased concentration of nutrition elements in sapropel-fertilised soils led to a decrease in content photosynthetic pigments and also lowered the fluorescence parameters of beans at the end of this experiment at BBCH stage 31, because the actual content of nutrients helps to slow photosynthesis pigment degradation and prolongs their active photosynthesis period (Juchnevičienė et al, 2015).…”

Section: Figmentioning

confidence: 86%

The effect of various sapropel concentrations on content and fluorescence of photosynthetic pigments of bean

Januškaitienė

Klepeckas

2017

EREM

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The impact of sapropel of Lake Tarosiškis on photosynthesis parameters (content of pigments and chlorophyll a fluorescence) of beans (Vicia faba L.) was investigated in this study. Plants were sown in 1 L volume pots by 5 seeds with light loamy soil and grown in growth chambers. Considering sapropel composition, 2.2, 3.1 and 4 t/ha dry sapropel concentrations were chosen for investigation. Sapropel-affected plants were compared with plants grown in unfertilised soils and soils fertilised with a synthetic fertiliser. On day 14 of the experiment, when the plants reached 2-leaves growth stage (BBCH 12), chlorophyll a fluorescence parameters of the investigated plants were measured. Then the plants were grown for another 4 weeks, and at the stem elongation stage (BBCH 31), chlorophyll a fluorescence parameters were measured repeatedly and the content of chlorophylls and carotenoids was investigated. The photosystem II efficiency of beans insignificantly increased (p > 0.05) by increasing sapropel concentration in the soil. Photosynthesis performance index increased (r = 0.91; p < 0.05) with increasing sapropel concentration up to 3.1 t/ha at BBCH growth stage 12. The same tendency was observed for the electron transport rate of beans (r = 0.9; p < 0.05) at this growth stage, but at a later stage (BBCH 31) it slightly lowered (r = -0.02; p > 0.05). At BBCH stage 12, the highest non-photochemical quenching (NPQ) value was measured in control beans, while at BBCH stage 31, the opposite trend was noticed (r = 0.86; p < 0.05). At BBCH growth stage 31, an increase in sapropel concentration made the bean chlorophyll content to decrease; however, this decrease was insignificant (r = -0.18, p > 0.05). The changes in the carotenoid content were similar to chlorophyll a+b.

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Section: Figmentioning

confidence: 86%

The effect of various sapropel concentrations on content and fluorescence of photosynthetic pigments of bean

Januškaitienė

Klepeckas

2017

EREM

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“…Fertilizing with nitrogen encourages the performance of the photosynthetic apparatus, helps to keep the chlorophyll a and b ratio stable, enhances growth, and slows development (Tranavičienė et al, 2007). Juchnevičienė et al (2015) discovered that additional fertilising with nitrogen in late wheat development stages slows photosynthesis pigment degradation and prolongs their active photosynthesis period. In this way, adding nutrient and especially nitrogen-rich sapropel can improve most of photosynthesis chlorophyll content and fluorescence parameters in both wheat and barley at early stages of development.…”

Section: Resultsmentioning

confidence: 99%

Changes in Triticum aestivum and Hordeum vulgare chlorophyll content and fluorescence parameters under impact of various sapropel concentrations

Klepeckas¹,

Januškaitienė²

2017

biologija

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The aim of this study was to investigate the impact of sapropel of Tarosiškis Lake on wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) photosynthesis parameters (the content of chlorophylls and chlorophyll fluorescence). Plants were sown in one-litre-volume pots by 10 seeds with light loamy soil and grown in growth chambers. Considering sapropel composition, 2.2, 3.1, and 4 t/ha dry sapropel concentrations were chosen for investigation. Sapropel-affected plants were compared with plants grown in unfertilized soils and soils fertilized with inorganic fertilizer. On day 14 of the experiment, when the plants reached the two-leaves development stage (BBCH 12), chlorophyll fluorescence parameters of the investigated plants were measured. Then the plants were grown for another four weeks and at the stem elongation stage (BBCH 31) chlorophyll fluorescence parameters were measured repeatedly, and the content of chlorophylls and carotenoids were measured as well. By increasing sapropel concentration in soil, the ratio Fv/Fm in wheat leaves increased (r = 0.97) significantly (p < 0.05) at BBCH 12 stage, but at the stem elongation stage the correlation coefficient was insignificant (r = 0.97) (p > 0.05). Fv/Fm of barley followed the same tendency. By increasing sapropel concentration, the PI index value also increased for wheat (r = 0.4; p > 0.05) and barley (r = 0.82; p < 0.05) at BBCH 12 stage, but at BBCH 31 stage it decreased. The electron transport rate increased in both wheat (r = 0.82; p < 0.05) and barley (r = 0.58; p < 0.05) at BBCH 12 stage too. With increasing sapropel concentration chlorophyll a+b content in wheat (r = 0.94) and barley (r = 0.81) increased significantly (p < 0.05), and the changes in the content of carotenoids in both plant species followed the same tendency (r = 0.87, p < 0.05).

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Azoto trąšų poveikis skirtingų žieminių kviečių veislių fotosintetiniams rodikliams

Cited by 2 publications

References 13 publications

The effect of various sapropel concentrations on content and fluorescence of photosynthetic pigments of bean

The effect of various sapropel concentrations on content and fluorescence of photosynthetic pigments of bean

Changes in Triticum aestivum and Hordeum vulgare chlorophyll content and fluorescence parameters under impact of various sapropel concentrations

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