Development of storage roots in radish (Raphanus sativus) plants as affected by light quality

Bukhov, N. G.; Bondar, V. V.; Drozdova, I. S.; Kara, A.N.; Kotov, A. A.; Maevskaya, S. N.; Vasiliev, A. A.; Voevudskaya, S. Yu.; Voronin, P. Yu.; Mokronosov, A. T.

doi:10.1016/s0176-1617(96)80141-6

Cited by 17 publications

(10 citation statements)

References 38 publications

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“…Under shading conditions, a major physiological modification of red beet is a decrease of carbon allocated to the storage roots . Indeed, in plants having a storage organ for carbohydrate accumulation, such as sugar beet and radish, stimulation of photosynthetic activity increases the root/shoot ratio …”

Section: Discussionmentioning

confidence: 99%

“…To date no studies have focused on the effects of light on accumulation of important nutrients and phytochemicals in root storage organs in plants. In root vegetables, the effect of quality and quantity of solar radiation has mainly been evaluated in terms of morphogenesis and dry mass accumulation . Specifically in the case of red beet, no studies investigating the effects of light stress on yield and quality have been published, while the influence of monochromatic light on pigment production has only been evaluated in hairy root cultures …”

Section: Introductionmentioning

confidence: 99%

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Application of photo‐selective films to manipulate wavelength of transmitted radiation and photosynthate composition in red beet (Beta vulgaris var. conditiva Alef.)

et al. 2013

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of photo‐selective films to manipulate wavelength of transmitted radiation and photosynthate composition in red beet (Beta vulgaris var. conditiva Alef.)

et al. 2013

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“…Nevertheless, this fact does not allow us to suggest that the photorespiration rate decreased in those leaves, because, as it was found earlier [32], the rate of photorespiration was similar in the third leaf of BL-and RL-grown radish plants. Thus this fact evidences only the specific action of BL on the contents of Ser and Gly.…”

Section: Resultsmentioning

confidence: 67%

Effect of Light Quality on Nitrogen Metabolism of Radish Plants

Maevskaya

Bukhov

2005

Russ J Plant Physiol

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The long-term action of blue or red light on nitrogen metabolism was studied in radish ( Raphanus sativus L.) plants. The potential activity of nitrate reductase (NR) in vivo and its maximum activity in vitro , the content of soluble protein and free amino acids were determined in the course of the growth of a third leaf of radish plants. The effect of light quality on NR activity was found to depend significantly on the stage of leaf development. Blue light (BL) stimulated NR activity in leaves, when their areas were about 11-13% of the fully developed leaves. The efficiency of red light (RL) was significantly lower, because the maximum NR activity was observed in the leaves developed to the stage, when their areas were 38-40% of the final one. The comparative analysis of the pool of free amino acids in expanding leaves of BL-or RL-grown plants revealed significant changes in the contents of individual amino acids. Despite a higher accumulation of two amino acids in the leaves of BL-grown plants, namely, Asp (27% as compared to 13-16% in the RL-grown leaves) and Gly (5% against 2.5% in RL-grown leaves), the BL-grown leaves also demonstrated a significant decrease in Ala (10% as compared to 23% in the RL-grown leaves) and some decrease in the amounts of Ser and Gly. The content of soluble protein in a juvenile BL-grown leaf was observed to decrease gradually during leaf development. However, the protein content in the BL-grown leaf was always higher than in the RL-grown leaf of the same age. We concluded that the photoregulatory action of BL on NR activity determined the different rates of nitrogen assimilation in BL-and RL-grown plants. Key words: Raphanus sativus -amino acids -light quality -nitrate reductase -development -soluble proteinAbbreviations : BL-blue light; GS-2/GOGAT-chloroplast glutamine synthetase/glutamine synthase; NR-nitrate reductase; RL-red light.

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“…For instance, the auxin/cytokinin ratio determined the processes of organogenesis and morphogenesis (Peres and Kerbany, 1999). High total level of two phytohormones, IAA and zeatin/zeatin riboside, promoted development of the underground storage tissues in radish roots (Bukhov et al ., 1996) and biomass accumulation, which was also mediated by high endogenous gibberellin (GA) levels in the root (Drozdova et al ., 1999).…”

Section: Resultsmentioning

confidence: 99%

The dynamics of hormonal status of developing red beet root (Beta vulgaris L.) in correlation with the dynamics of sugar accumulation

Озолина

Pradedova

Salyaev

2005

Biol Bull Russ Acad Sci

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Phytohormones play an important role in regulation of vital activity of plants (Polevoi and Salamatova, 1991). Manipulation of plant life in a desirable direction requires full understanding of the control mechanisms of phytohormones. As early as 1976, A.L. Kursanov proposed an important role of phytohormones in regulation of accumulation of assimilates in storage organs (Kursanov, 1976). Such hormones primarily include indole-3-acetic acid (IAA) and kinetin; their application on a growing tissue is known to promote flow of assimilates to it (Borzenkova and Mokronosov, 1976;Ron'zhina, 1999). In order to test possible hormonal regulation of sugar accumulation in red beet roots, we compared the dynamics of phytohormone contents in ontogenesis with the dynamics of sugar accumulation and outflow. These data are also interesting for the studies of the physiological role of phytohormones. MATERIALS AND METHODSExperiments were carried out on roots of red beet ( Beta vulgaris L.), cultivar Bordo. The plants were grown on an experimental plot of the Institute. Plant probes were collected at all ontogenetic stages. Red beet is a biennial; accordingly, the whole period of growth and development was divided into the following stages: stage 1, onset of the first year of vegetation; stage 2, end of the first year of vegetation; stage 3, onset of the dormant period (the roots were left in a vegetable store for several months at 4 ° C); stage 4, activation period in spring; stage 5, onset of the second vegetation period before peduncle formation; and stage 6, second year of vegetation, the period of flowering.Phytohormones were extracted from the plant material using standard techniques (Volynets and Pal'chenko, 1976; Metodicheskie rekomendatsii… , 1986;Rekoslavskaya et al ., 1994). Quantitation of IAA, abscisic acid (ABA), zeatin, and zeatin riboside was performed on a liquid chromatographer KhZh 1311 equipped with a microcolumn ( 250 × 0.7 mm) and a spectrophotometric detector using isocratic elution with a 45% acetonitrile in 1% acetic acid. Gibberellinlike substances were quantified through three biological tests based on stimulation of amylolytic activity in wheat endosperm (cultivar Skala) and hypocotyl elongation in cucumber (cultivar Konkurent) and in lettuce seedlings (cultivar yellow Berlinskii) (Muromtsev and Agnistikova, 1984). Total water-soluble sugars were determined using anthrone reagent ( Biokhimicheskie metody… , 1971); potassium was assayed by flame photometry ( Fiziko-khimicheskie metody… , 1988).The experiments were performed in 5-7 replicates. Figures present the arithmetic means and standard deviations. RESULTS AND DISCUSSIONWe started to study the dynamics of phytohormone content in red beet roots from IAA. Our experiments were limited to determination of free IAA since only this form of the hormone could participate in the studied processes. Figure 1a shows the results of these experiments. Two peaks in the content of free IAA were revealed in red beet root ontogenesis. The first smaller one was obs...

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Development of storage roots in radish (Raphanus sativus) plants as affected by light quality

Cited by 17 publications

References 38 publications

Application of photo‐selective films to manipulate wavelength of transmitted radiation and photosynthate composition in red beet (Beta vulgaris var. conditiva Alef.)

Application of photo‐selective films to manipulate wavelength of transmitted radiation and photosynthate composition in red beet (Beta vulgaris var. conditiva Alef.)

Effect of Light Quality on Nitrogen Metabolism of Radish Plants

The dynamics of hormonal status of developing red beet root (Beta vulgaris L.) in correlation with the dynamics of sugar accumulation

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