Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

/ I. L. Milyutina, N. E. Sudachkova, L. I. Romanova // Contemp. Probl. Ecol. - 2013. - Vol. 6, Is. 2. - P149-155, DOI 10.1134/S199542551302011X. - Cited References: 29 . - 7. - ISSN 1995-4255РУБ Ecology

Аннотация: The effect of stand density on the antioxidant system of Scots Pine (Pinus silvestris L.) and Siberian Pine (Pinus sibirica Du Tour) was studied. The dynamics of concentrations of chlorophyll, hydrogen peroxide, glutathione, ascorbic acid, and dehydroascorbic acid were investigated during the vegetation period. In addition, the activities of superoxide dismutase, catalase, peroxidase, glutathione reductase, and ascorbate peroxidase were observed in the 1-year needles of 26-year-old trees with an initial stand density of 0.5 and 128 thousand individuals ha(-1).

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Держатели документа:
[Milyutina, I. L.
Sudachkova, N. E.
Romanova, L. I.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia

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Milyutina, I.L.; Sudachkova, N.E.; Romanova, L.I.

/ G. F. Antonova [et al.] // Russ. J. Dev. Biol. - 2012. - Vol. 43, Is. 4. - P199-208, DOI 10.1134/S1062360412040029. - Cited References: 51. - This work was supported by the Russian Foundation for Basic Research, project no. 06-04-49501. . - 10. - ISSN 1062-3604РУБ Developmental Biology

Аннотация: The content and fractional composition of alcohol soluble phenolic acids (PhA) in cells with different degree maturation and lignification in the course of early and late wood formation in the pine (Pinus sylvestris L.) stem during vegetation were studied. Phenolic compounds (PhC), extracted by 80% ethanol, were divided into free and bound fractions of PhA. In turn, the esters and ethers were isolated from bound PhA. The contents of all substances were calculated per dry weight and per cell. Considerable differences have been found to exist in both the contents and the composition of the fractions PhA on successive stages of tracheid maturation of early and late xylem. Early wood tracheids at all secondary wall thickening steps contained PhC less and free PhA more than late wood tracheids. Throughout earlywood tracheid maturation, the pool of free PhA per cell declined at the beginning of lignification and then increased gradually while that of bound PhA decreased. The maturation of late wood tracheids were accompanied by the rise of free PhA pool and the diminution of bound PhA pool. In the composition of bound PhA, the ethers were always dominant, and the amount of that in earlywood cells was less than in latewood cells. The cells of early xylem at all steps of maturation contained more of esters. The sum total of free hydroxycinnamic acids, precursors of monolignols, gradually decreased during early xylem lignification as the result of the reduction of the pools of p-coumaric, caffeic, ferulic and synapic acids, while that of their esters rised. In the course of late xylem lignification, the pools of free p-coumaric, ferulic and, especially, synapic acids increased. Simultaneously, the amount of ferulic acid ester and synapic acid ether increased too. According to the data, lignin biosynthesis in early xylem and late xylem occurs with different dynamics and the structure of lignins of two xylem types might be different too.

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Держатели документа:
[Antonova, G. F.
Varaksina, T. N.
Zheleznichenko, T. V.
Stasova, V. V.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Antonova, G.F.; Varaksina, T.N.; Zheleznichenko, T.V.; Stasova, V.V.

[Text] / G. F. Antonova, T. V. Zheleznichenko, V. V. Stasova // Russ. J. Dev. Biol. - 2011. - Vol. 42, Is. 4. - P238-246, DOI 10.1134/S1062360411020032. - Cited References: 48. - This work was supported by the Russian Foundation for Basic Research, project no. 06-04-49501. . - 9. - ISSN 1062-3604РУБ Developmental Biology

Аннотация: The content and composition of alcohol soluble phenolic acids (PhAs) were studied during cell xylem growth in course of wood annual increment formation in the trunks of Scots pine. Cells of the cambium zone, two stages of expansion growth, and outset of secondary thickening zone (before lignification) within the period of formation of early wood xylem were subsequently isolated from trunk segments of 25-year-old trees with constant anatomical and histochemical control. The amount of free and bound forms of phenolic acids extracted from tissues by 80% ethanol, as well as their ethers and esters, were calculated both per dry weight and per cells. The substantial alteration in content, proportion of fractions and composition of acids has been found between the cambium zone and the outset of secondary thickening of tracheids, and the character of variation depended on the calculation method. The amount of free and bound PhAs and esters and especially ethers calculated per cell had increased at the first stage of extension growth, reduced at the second, and increased in the outset of secondary wall deposition. The pool of bound acids was more than acids by 2-5 times depending on the stage of development of the cells. Sinapic and ferulic acids dominate among free hydroxycinnamic acids. The composition and the content of hydroxycinnamic acids in esters and ethers also depended on the stage of development of the cells. p-Coumaric and sinapic acids were the main aglycons in ethers in the cambium and sinapic and caffeic acids were in the other stages. The esters from cambium included mostly p-coumaric acid and those at other stages of development were sinapic and ferulic acids. The esters included benzoic acid at the first stages of growth. The pool of these esters decreased from the first phase of growth until the outset of cell wall thickening. The level of free benzoic acid increased respectively.

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Держатели документа:
[Antonova, G. F.
Zheleznichenko, T. V.
Stasova, V. V.] Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Antonova, G.F.; Zheleznichenko, T.V.; Stasova, V.V.

[Text] / G. F. Antonova [et al.] // Russ. J. Plant Physiol. - 2005. - Vol. 52, Is. 1. - P83-92, DOI 10.1007/s11183-005-0013-x. - Cited References: 29 . - 10. - ISSN 1021-4437РУБ Plant Sciences

Аннотация: The contents of ascorbic acid (AA) and its oxidized form, dehydroascorbic acid (DHA), were assessed as related to the tracheid differentiation in the course of early and late wood development in the Siberianlarch (Larix sibirica Ldb.) trees. The samples of the cambium, cell enlargement zone and mature cells were collected at the successive developmental stages by scraping tissues off layer by layer from trunk segments of the 20-year-old trees according to anatomical and histochemical criteria. While cambium initials were rapidly dividing, the AA contents per dry weight and per cell considerably exceeded the corresponding values characteristic of the late xylem development; such difference corresponded to the higher number of early tracheids per annual ring, as compared to the late tracheids. The AA content decreased as cells enlarged. The radial growth of the early wood tracheids, as compared to the late wood tracheids, was accompanied with a threefold increase in the AA and a decline in the DHA contents. The AA/DHA ratio was in line with the early tracheid enlargement. The maximum AA content was observed at the early stage of the secondary cell wall thickening in the tracheids of early and late xylem preceding lignification. During this stage of early wood development, the DHA content exceeded sixfold the corresponding value in the late xylem; as a result, the initial rates of lignification were different in two tissues. The rate of lignification in a newly developing layer of the early xylem increased gradually and was the highest in the completely differentiated tracheids. In the late xylem, the lignification rate was at its highest at the very beginning and then declined in the course of tracheid maturation. The dissimilar patterns of lignification in the early and late xylem were primarily associated with the DHA content, which increased in the early xylem and decreased in the maturing late xylem. Thus, the AA content and its accessibility to oxidation in the growing and mature xylem cells exhibited the diverse developmental patterns in the early and late xylem: two tissues differed in the tracheid number and radial diameter as well as in the rate of lignification.

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Держатели документа:
Russian Acad Sci, Sukachev Inst Forestry, Siberian Div, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Antonova, G.F.; Chaplygina, I.A.; Varaksina, T.N.; Stasova, V.V.

[Text] / G. F. Antonova, V. V. Stasova, T. N. Varaksina // Russ. J. Plant Physiol. - 2009. - Vol. 56, Is. 2. - P190-199, DOI 10.1134/S1021443709020071. - Cited References: 30. - This work was supported by the Russian Foundation for Basic Research, project no. 06-04-49501. . - 10. - ISSN 1021-4437РУБ Plant Sciences

Аннотация: Changes in the levels of ascorbic acid (AA), its oxidized form, dehydroascorbic acid (DHA), and uronic acids as initial precursors for the AA synthesis were studied as related to the degree of xylem and phloem cell development in the course of early and late wood formation in the trunks of Scots pine (Pinus sylvestris L.). The cells of mature and conducting phloem, cambial zone, differently developed cells in the zones of cell enlargement and maturation were obtained by successive scraping tissue layers from trunk segments of 20-25-year-old trees; tissue identification was checked anatomically and histochemically. The contents of compounds tested were calculated per dry weight and per cell basis. We found great differences in the contents of AA and DHA and also in their ratio in dependence of the wood type developing in the pine trunks during growth period and on the stage of differentiation of xylem and phloem cells. Changes in the AA content during xylem cell differentiation were accompanied by changes in the content of uronic acids. The amounts of AA, DHA, and uronic acids were the highest at the stage of early lignification and reduced with tracheid maturation. The AA to DHA ratio changed differently in the course of early and late xylem lignification. It reduced from the start of lignification to the formation of early mature xylem and, in contrast, increased in mature late wood; this indicates a difference in the level of redox processes in these tissues.

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Держатели документа:
[Antonova, G. F.
Stasova, V. V.
Varaksina, T. N.] Russian Acad Sci, Sukachev Inst Forest, Siberian Div, Akad Gorodok, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Antonova, G.F.; Stasova, V.V.; Varaksina, T.N.; Russian Foundation for Basic Research [06-04-49501]