Ethylene responses in three Hydrangea lines
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Ethylene responses in three Hydrangea lines. / Lauridsen, Uffe Bjerre; Müller, Renate; Lütken, Henrik Vlk.
In: Acta Horticulturae, Vol. 1060, 2015, p. 39-46.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Ethylene responses in three Hydrangea lines
AU - Lauridsen, Uffe Bjerre
AU - Müller, Renate
AU - Lütken, Henrik Vlk
N1 - Conference code: 10
PY - 2015
Y1 - 2015
N2 - AbstractThe ornamental scrub Hydrangea is generally not considered to beparticularly sensitive to the phytohormone ethylene. The present study aimed attesting ethylene sensitivity in three different Hydrangea lines: 1, 2 and 3 taking into account the effect of temperature. Ethylene response was measured as leaf epinasty and leaf drop. Data indicated that higher temperature accelerates the effect of 2 μl L-1 ethylene over a 12-day period, and if the inhibitor 1-methylcyclopopene 1-MCP is able to attenuate this effect. Breeding line 1 and 3 dropped 3.8±0.6 and 5.0±0.4 leaves on average, respectively, during the 12-day experimental period. Non-treated controls of line 1 and 3 dropped 1.8±0.6 and 1.8±0.4 leaves, respectively. In contrast, line 2 did not show a significant response to ethylene treatment with a leaf drop of 2.1±0.3 leaves, compared to a leaf drop of 0.8±0.3 in non-treated controls.Furthermore, the type of response between the lines varied. Line 2 was prone tohave higher epinasty/leaf drop ratio, compared to line 1. Interestingly, the dataindicated that ethylene had a flower inducing effect on 180-day sold plants with an acceleration of up to 30 days, compared to controls. 90-day-old plants treated with ethylene did not show decreased time to flower. This suggests that an age and developmental threshold exists for an initiation of flower development utilizing ethylene in Hydrangea. It is likely that the 90-day-old plants were not yet competent for the flower evocation signal, whereas the apical buds of the 180-day-old plants had undergone the required developmental processes making them competent.
AB - AbstractThe ornamental scrub Hydrangea is generally not considered to beparticularly sensitive to the phytohormone ethylene. The present study aimed attesting ethylene sensitivity in three different Hydrangea lines: 1, 2 and 3 taking into account the effect of temperature. Ethylene response was measured as leaf epinasty and leaf drop. Data indicated that higher temperature accelerates the effect of 2 μl L-1 ethylene over a 12-day period, and if the inhibitor 1-methylcyclopopene 1-MCP is able to attenuate this effect. Breeding line 1 and 3 dropped 3.8±0.6 and 5.0±0.4 leaves on average, respectively, during the 12-day experimental period. Non-treated controls of line 1 and 3 dropped 1.8±0.6 and 1.8±0.4 leaves, respectively. In contrast, line 2 did not show a significant response to ethylene treatment with a leaf drop of 2.1±0.3 leaves, compared to a leaf drop of 0.8±0.3 in non-treated controls.Furthermore, the type of response between the lines varied. Line 2 was prone tohave higher epinasty/leaf drop ratio, compared to line 1. Interestingly, the dataindicated that ethylene had a flower inducing effect on 180-day sold plants with an acceleration of up to 30 days, compared to controls. 90-day-old plants treated with ethylene did not show decreased time to flower. This suggests that an age and developmental threshold exists for an initiation of flower development utilizing ethylene in Hydrangea. It is likely that the 90-day-old plants were not yet competent for the flower evocation signal, whereas the apical buds of the 180-day-old plants had undergone the required developmental processes making them competent.
U2 - 10.17660/ActaHortic.2015.1060.5
DO - 10.17660/ActaHortic.2015.1060.5
M3 - Journal article
VL - 1060
SP - 39
EP - 46
JO - Acta Horticulturae
JF - Acta Horticulturae
SN - 0567-7572
T2 - International Symposium on Postharvest Quality of Ornamental Plants 2015
Y2 - 10 January 2015
ER -
ID: 130640331