Studies of Temperature and Chemical Treatments on Rosette Morphology of Eustoma grandiflorum Seedlings
Date Issued
2010
Date
2010
Author(s)
Chien, Chia-Wei
Abstract
The cut flower of Eustoma grandiflorum is one of the most important flowers in Taiwan, but cut flower has problem with rosetted seedling. First, this study aimed to investigate the effect of seed imbibition and seedling low temperature treatments on reducing rosette formation in Eustoma grandiflorum, in order to avoid rosetted seedling .Second, The using of chemical treatments to induced bolting in the rosette plant Eustoma grandiflorum, in order to solve rosetted plant after transplanting. Therefore, the different style between rosetted plant and bolting plant, development of relation between seedling morphology and rosette formation index in Eustoma grandiflorum ,to separate rosetted plant early .
Experiment of effect of seed imbibition and seedling low temperature treatments on reducing rosette formation in Eustoma grandiflorum showed that the percentage of bolting rate was higher with 6 and 8 weeks low temperature treatment.It is no plant bolting in control treatment (0 week low temperature) .The low temperature requirement is different between each cultivar . ‘Moret Marine’ had gotten higher bolting rate in 4 weeks low temperature treatment. But ‘Rosina Ⅲ Pink’ need above 8 weeks. Using 0、1、3 and 5 weeks 10 ℃ seed imbibition complex seedling low temperature treatment could decrease duration of low temperature treatment.
The using of chemical treatments to induced bolting in the rosette plant Eustoma grandiflorum .The longer 10 ℃ seed imbibition, the higher bolting rate. Complexion medical treatment could enhance bolting rate, especially, with 200 μM GSH. Rosetted plant was bolting after 3 weeks using 300 μM GA3 and bolting rate was 100 %.The different duration of using 300 μM GA3 showed that use only 2 and 4 weeks medical had gotten aerial rosette, over 6 weeks medical treatment could avoid aerial rosette. Three growth temperature treatment after seed imbibition different medical showed that 300 μM GA3 increase bolting rate. Rosetted Plants used 75, 150, 300 μM GA3 complex with Fluridone 10μM, GSH 200 μM, BL 0.04 μM. GA3 could break 6 pair leaves rosetted plant bolting.It is better growth with complex 200 μM GSH or 0.04 μM BL.
Establish of relation between seedling morphology and rosette formation index in Eustoma grandiflorum.It could early distinguish rosette seedling. Leaf temperature was different between rosetted plant and bolting plant. Rosetted plant had higher leaf temperature in the flied than bolting plant. The upper leaf of bolting plant leaf temperature was lower than lower leaf. Experiment on effect of different 20 ℃ durations showed that the morphology of ‘Rosina Blue ’ leaf angle scale was higher, leaf temperature was lower in longer 20 ℃ duration. The result of one week 10 ℃ seed imbibition complex different 20 ℃ durations, leaf angle scale was also higher, leaf temperature was also lower in longer 20 ℃ duration. Leaf spectral reflectance analyses ‘Rosina Blue’, ‘Haru Ichiban’, ‘Ceremony Blue Flash’ vegetable index. Under low temperature seedling showed that leaf width was narrow, lower width to length ratio and leaf temperature, higher NDVI value and CHL value. It could use to the index of rosetted seedling.
Subjects
leaf temperature
vegetation index
plant growth regulator
thermoimage
SDGs
Type
thesis
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