EFFECTS OF AUXIN POLAR TRANSPORT INHIBITORS ON THE GROWTH OF THE EXCISED FOURTH INTERNODE IN TULIPS
PBN-AR
Instytucja
Instytut Ogrodnictwa
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
Journal of Horticultural Research
ISSN
2300-5009
EISSN
Wydawca
Instytut Ogrodnictwa
DOI
Rok publikacji
2013
Numer zeszytu
2
Strony od-do
31-39
Numer tomu
21
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Słowa kluczowe
angielski
auxin polar transport inhibitors
indole-3-acetic acid
methyl 2-chloro-9-hydroxyfluorene-9-carboxylate
N-1-naphthylphthalamic acid
2
3
5-triiodobenzoic acid
tulip
Open access
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Creative Commons — Uznanie autorstwa-Niekomercyjne-Bez utworów zależnych
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Po publikacji
Ilość miesięcy od publikacji
20
Data udostępnienia w sposób otwarty
Streszczenia
Język
angielski
Treść
Effects of auxin polar transport inhibitors: methyl 2-chloro-9-hydroxyfluorene-9-carboxylate (mor-phactin IT 3456), 2,3,5-triiodobenzoic acid (TIBA) and N-1-naphthylphthalamic acid (NPA) on elongation growth of the excised fourth internode of tulips (Tulipa gesneriana L.) cv. Apeldoorn were studied. After removal of flower bud, the continuing elongation of the excised fourth internode kept in water in normal or inverted position was observed, the elongation in inverted position being significantly higher than that in the normal position. On the other hand, the application of these inhibitors (0.2%, w/w in lanolin) in the place of removed flower bud substantially enhanced the elongation, the stimulation being much higher in the normal position than in the inverted one. When the inhibitors were applied in the middle or 1 cm from the base of the internode, the growth-promoting effect of these inhibitors was observed both in the upper and lower part of the internode, being greater in the upper part of the internode, regardless of the position of explants. Simultaneous application of indole-3-acetic acid (IAA) (0.1%, w/w in lanolin) at the place of the removed flower bud in the normal position with morphactin, TIBA and NPA applied in the middle or 1 cm from the base of the excised internode greatly stimulated the elongation, whereas almost no growth-promoting effect of these inhibitors was observed, in comparison to IAA. On the contrary, when IAA was applied on the base of the excised internode in the inverted position, the growth was inhibited, compared to that with lanolin only. The inhibitory effect of auxin was eliminated by the simultaneous application of morphactin, TIBA and NPA placed in the middle of the excised internode. These results suggest that auxin levels in the excised internode regulated by auxin polar transport play a crucial role in the regulation of its elongation growth.
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ORIGINAL_ARTICLE
Inne
System-identifier
591767
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