Floral induction (FI) in longan (Dimocarpus longan, Lour.) trees-The possible participation of endogenous hormones. II. Low temperature and potassium chlorate effects on hormone concentrations in and their export out of leaves

Floral induction in longan (Dimocarpus longan Lour.) trees by low temperature (LT) or potassium chlorate (KClO3) treatment, is supposed to act, at least partially, by their interference with the hormonal concentration and/or export out of leaves. Therefore the effect of LT and KClO3on hormone concen...

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Main Authors: K. Sringarm, P. Potchanasin, P. Sruamsiri, K. F. Bangerth
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/48762
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spelling th-cmuir.6653943832-487622018-08-16T01:57:09Z Floral induction (FI) in longan (Dimocarpus longan, Lour.) trees-The possible participation of endogenous hormones. II. Low temperature and potassium chlorate effects on hormone concentrations in and their export out of leaves K. Sringarm P. Potchanasin P. Sruamsiri K. F. Bangerth Agricultural and Biological Sciences Floral induction in longan (Dimocarpus longan Lour.) trees by low temperature (LT) or potassium chlorate (KClO3) treatment, is supposed to act, at least partially, by their interference with the hormonal concentration and/or export out of leaves. Therefore the effect of LT and KClO3on hormone concentration and transport rate of leaves was investigated in these experiments. Results of experiments below show that LT-, but not KClO3, treatment considerably increased the leaf export of N6(Δ2-isopentenyl) adenine/N6(Δ2-isopentenyl) adenosine (iP/iPA) together with indole acetic acid (IAA). Export rates of Zeatin/Zeatin riboside (Z/ZR) and gibberellins (GA) were very low and often below the detection limit (<10 ng). Practically no correlation between the concentrations of IAA, and iP/iPA-type CK of leaves and their export rates out of leaves after LT- or KClO3treatment were observed. This suggests a specific and independent export rate regulation by these two treatments. Potassium chlorate also strongly increased the production of ethylene in leaves. Whether this burst in ethylene is involved in the FI process, or is merely a stress response of the plant against the herbicide KClO3, is unknown but could easily be tested by using inhibitors of ethylene biosynthesis/action. The results of these experiments and their effect on hormonal change and FI in the shoot (results of Part I experiments) are discussed. © 2009. 2018-08-16T01:57:09Z 2018-08-16T01:57:09Z 2009-09-17 Journal 03044238 2-s2.0-67650002692 10.1016/j.scienta.2008.11.031 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=67650002692&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/48762
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Agricultural and Biological Sciences
spellingShingle Agricultural and Biological Sciences
K. Sringarm
P. Potchanasin
P. Sruamsiri
K. F. Bangerth
Floral induction (FI) in longan (Dimocarpus longan, Lour.) trees-The possible participation of endogenous hormones. II. Low temperature and potassium chlorate effects on hormone concentrations in and their export out of leaves
description Floral induction in longan (Dimocarpus longan Lour.) trees by low temperature (LT) or potassium chlorate (KClO3) treatment, is supposed to act, at least partially, by their interference with the hormonal concentration and/or export out of leaves. Therefore the effect of LT and KClO3on hormone concentration and transport rate of leaves was investigated in these experiments. Results of experiments below show that LT-, but not KClO3, treatment considerably increased the leaf export of N6(Δ2-isopentenyl) adenine/N6(Δ2-isopentenyl) adenosine (iP/iPA) together with indole acetic acid (IAA). Export rates of Zeatin/Zeatin riboside (Z/ZR) and gibberellins (GA) were very low and often below the detection limit (<10 ng). Practically no correlation between the concentrations of IAA, and iP/iPA-type CK of leaves and their export rates out of leaves after LT- or KClO3treatment were observed. This suggests a specific and independent export rate regulation by these two treatments. Potassium chlorate also strongly increased the production of ethylene in leaves. Whether this burst in ethylene is involved in the FI process, or is merely a stress response of the plant against the herbicide KClO3, is unknown but could easily be tested by using inhibitors of ethylene biosynthesis/action. The results of these experiments and their effect on hormonal change and FI in the shoot (results of Part I experiments) are discussed. © 2009.
format Journal
author K. Sringarm
P. Potchanasin
P. Sruamsiri
K. F. Bangerth
author_facet K. Sringarm
P. Potchanasin
P. Sruamsiri
K. F. Bangerth
author_sort K. Sringarm
title Floral induction (FI) in longan (Dimocarpus longan, Lour.) trees-The possible participation of endogenous hormones. II. Low temperature and potassium chlorate effects on hormone concentrations in and their export out of leaves
title_short Floral induction (FI) in longan (Dimocarpus longan, Lour.) trees-The possible participation of endogenous hormones. II. Low temperature and potassium chlorate effects on hormone concentrations in and their export out of leaves
title_full Floral induction (FI) in longan (Dimocarpus longan, Lour.) trees-The possible participation of endogenous hormones. II. Low temperature and potassium chlorate effects on hormone concentrations in and their export out of leaves
title_fullStr Floral induction (FI) in longan (Dimocarpus longan, Lour.) trees-The possible participation of endogenous hormones. II. Low temperature and potassium chlorate effects on hormone concentrations in and their export out of leaves
title_full_unstemmed Floral induction (FI) in longan (Dimocarpus longan, Lour.) trees-The possible participation of endogenous hormones. II. Low temperature and potassium chlorate effects on hormone concentrations in and their export out of leaves
title_sort floral induction (fi) in longan (dimocarpus longan, lour.) trees-the possible participation of endogenous hormones. ii. low temperature and potassium chlorate effects on hormone concentrations in and their export out of leaves
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=67650002692&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/48762
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