Wzrost i rozciągliwość segmentów koleoptyli kukurydzy traktowanych glinem

• Autorzy: Mizerski R. , Kurtyka R. , Karcz W.

Warianty tytułu

EN

Growth and extensibility of maize coleoptile segments treated with aluminum

• Języki publikacji: PL

Abstrakty

PL

Jak powszechnie wiadomo, jony glinu są fitotoksyczne w środowisku o pH poniżej 5,0. Wymienia się różne symptomy toksyczności glinu, spośród których najczęściej obserwowanymi są hamowanie podziałów komórkowych oraz wydłużania komórek. Badania na temat działania glinu na wzrost i rozciągliwość ścian są rzadkością. Eksperymenty przeprowadzono na 10 mm segmentach koleoptyli wycinanych z czterodniowych, etiolowanych siewek Zea mays L. odmiany K33xF2. Wzrost wydłużeniowy segmentów oraz rozciągliwość ścian ich komórek mierzono za pomocą liniowego transducera kątowego. Glin (AlCl₃) stosowano w stężeniu końcowym 10⁻³ mol·dm⁻³. Wykazano, że traktowanie segmentów koleoptyli Zea mays L. glinem powoduje zahamowanie wzrostu wydłużeniowego i zmiany w mechanicznych własnościach ich ścian. Stwierdzono także, że glin silnie zmniejsza całkowitą i plastyczną rozciągliwość segmentów. Wyniki przez nas uzyskane potwierdzają hipotezę, że jony glinu mogą zmieniać mechaniczne własności ściany komórkowej.

EN

Presently it is well established that aluminum ions are phytotoxic at pH below 5.0. There are various symptoms of aluminium toxicity in plants among which the inhibition of cell elongation and cell division are often observed. Few research results were published concerning the effect of Al on growth and cell extensibility. The experiments were carried out with 10 mm-long coleoptile segments cut from four-day-old etiolated Zea mays L. cv. K33xF2 seedlings. The elongation growth of segments and extensibility of cells were determined by means of a linear angular transducer. Aluminum (AlCl₃) in the final concentration of 10⁻³ mol·dm⁻³ was used. We showed that the exposure of Zea mays L. coleoptile segments to aluminum brought about the suppression of their elongation growth and changes in mechanical properties of cell walls. It was also found that aluminum ions significantly decreased both total and plastic extension of segments. Our data support the hypothesis that aluminum ions may change mechanical properties of cell wall.

Słowa kluczowe

PL

glin; hamowanie wzrostu; jony glinu; koleoptyl; kukurydza; rozciagliwosc; segmenty koleoptyli; sila wzrostu; wzrost; Zea mays

EN

aluminium; growth inhibition; aluminium ion; coleoptile; maize; extensibility; coleoptile segment; growth vigor; growth; Zea mays

• Wydawca: -
• Czasopismo: Zeszyty Problemowe Postępów Nauk Rolniczych
• Rocznik: 2008
• Tom: 524
• Opis fizyczny: s.317-325,wykr.,bibliogr.

Twórcy

autor

Mizerski R.

• Katedra Fizjologii Roślin, Uniwersytet Śląski w Katowicach, ul.Jagiellońska 28, 40-032 Katowice

autor

Kurtyka R.

autor

Karcz W.

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