Auxin (IAA) and soluble carbohydrate seasonal dynamics monitored during xylogenesis and phloemogenesis in Scots pine
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DOI:
10.3832/ifor2734-011Автор:
Marek, Fajstavr
Zuzana, Paschová
Kyriaki, Giagli
Hanuš, Vavrčík
Vladimír, Gryc
Урбан, Йозеф
Коллективный автор:
Институт экологии и географии
Лаборатория биогеохимии экосистем
Дата:
2018-01Журнал:
iForestКвартиль журнала в Scopus:
Q2Квартиль журнала в Web of Science:
Q3Библиографическое описание:
Marek, Fajstavr. Auxin (IAA) and soluble carbohydrate seasonal dynamics monitored during xylogenesis and phloemogenesis in Scots pine [Текст] / Fajstavr Marek, Paschová Zuzana, Giagli Kyriaki, Vavrčík Hanuš, Gryc Vladimír, Йозеф Урбан // iForest: Series A. — 2018. — Т. 11. — С. 553-562Аннотация:
The metabolic activity of phytohormones and the accumulation of carbohydrates
affect the reactivation of the cambial zone and the radial increment of
woody plants. We aimed to monitor the dynamics of indole-3-acetic acid (IAA)
concentration and amounts of soluble carbohydrates during xylem and phloem
formation of one growing season (2015). Six sample trees of Scots pine (Pinus
sylvestris L.), aged 80 years on average, growing in the Sobešice research site
(404 m a.s.l.) in the Czech Republic were selected. We obtained microcore
samples at weekly intervals by the Trephor tool method for cell formation
analysis and spectrophotometric determination of IAA and soluble carbohydrate
contents. We found that time of the highest concentration of IAA (last
week of April) coincided with time of the maximum number of cells in the
cambial zone and highest expansion of the cell enlargement stage. When the
IAA concentration was too low to be measured, latewood tracheids started to
form, and late phloem sieve cell formation ceased. The highest concentration
of soluble carbohydrates was 200.40 ± 21.6 μg GLU per sample (May 14). This
coincided with the fastest weekly xylem cell increment. This research shows
that IAA and soluble carbohydrate dynamics directly affects xylem and phloem
formation.