Abstract
Effects of plant growth regulators on the growth of rhizomes developed from defoliated pseudobulbs of Cymbidium Elfs Castle ‘China Peak’, as well as ethylene evolution and gibberellin activities in rhizomes were investigated for the utilization of rhizomes for propagation. Rhizomes, growing in the dark, were sprayed with a solution of 100 ppm aminoethoxyvinylglycine (AVG), uniconazole or 10 ppm gibberellic acid (GA3), while the control rhizomes were treated with water and cultured in the dark. A group of water-treated rhizomes were exposed to light (60% of natural daylight). Light-treated rhizomes ceased to grow and but promoted leaf development. AVG decreased the number of nodes and length of internodes of rhizomes, but increased leaf length and number of roots. GA3 promoted leaf growth but did not affect rhizome growth and rooting. Uniconazole reduced rhizome growth without affecting number of nodes and leaf growth, while it promoted rooting. The above treatments were conducted with Cym. ‘Miss Taipei’ to determine ethylene evolution and gibberellin (GA) substance content. Ethylene evolution from rhizomes ‘Miss Taipei’ was inhibited by light, AVG, and uniconazole treatments. Bioassays of the control rhizomes revealed that GA3-, GA4- and GA7-like substances were found in fraction numbers of 6, 13, 10 on the TLC plates. GA3-like substance increased in the light-treated rhizomes, but decreased significantly in the uniconazole treatment, whereas AVG had no effect on the total GA-like substance contents. Thus, it is suggested that growth characteristics of rhizomes in cymbidium plants may be controlled not only by GA activities but also by ethylene, and that it is possible to propagate mother stocks by controlling the levels of plant hormones in rhizomes.
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Claims 15
Claim · model-written summary
Light stopped rhizome growth and promoted leaf development.
CymbidiumNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Light-treated rhizomes ceased to grow and but promoted leaf development.”
t0“Cymbidium Hybrids”
Claim · model-written summary
AVG decreased rhizome node number and internode length.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AVG decreased the number of nodes and length of internodes of rhizomes”
t0“Cymbidium Hybrids”
Claim · model-written summary
AVG increased leaf length and root number.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AVG decreased the number of nodes and length of internodes of rhizomes, but increased leaf length and number of roots”
t0“Cymbidium Hybrids”
Claim · model-written summary
GA3 promoted leaf growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GA3 promoted leaf growth but did not affect rhizome growth and rooting.”
t0“Cymbidium Hybrids”
Claim · model-written summary
GA3 did not affect rhizome growth or rooting.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GA3 promoted leaf growth but did not affect rhizome growth and rooting.”
t0“Cymbidium Hybrids”
Claim · model-written summary
Uniconazole reduced rhizome growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uniconazole reduced rhizome growth without affecting number of nodes and leaf growth, while it promoted rooting.”
t0“Cymbidium Hybrids”
Claim · model-written summary
Uniconazole did not affect node number or leaf growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uniconazole reduced rhizome growth without affecting number of nodes and leaf growth, while it promoted rooting.”
t0“Cymbidium Hybrids”
Claim · model-written summary
Uniconazole promoted rooting.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uniconazole reduced rhizome growth without affecting number of nodes and leaf growth, while it promoted rooting.”
t0“Cymbidium Hybrids”
Claim · model-written summary
Light, AVG, and uniconazole inhibited ethylene evolution from Miss Taipei rhizomes.
- Material
- Miss Taipeie0
- Treatment
- light, AVG, and uniconazole treatmentse0
- Outcome
- Ethylene evolutione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethylene evolution from rhizomes ‘Miss Taipei’ was inhibited by light, AVG, and uniconazole treatments.”
t0“Cymbidium Hybrids”
Claim · model-written summary
GA3-, GA4- and GA7-like substances were detected in control rhizome fractions.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GA3-, GA4- and GA7-like substances were found in fraction numbers of 6, 13, 10 on the TLC plates.”
t0“Cymbidium Hybrids”
Claim · model-written summary
Light increased GA3-like substance in rhizomes.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GA3-like substance increased in the light-treated rhizomes”
t0“Cymbidium Hybrids”
Claim · model-written summary
Uniconazole significantly decreased GA3-like substance in rhizomes.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GA3-like substance increased in the light-treated rhizomes, but decreased significantly in the uniconazole treatment”
t0“Cymbidium Hybrids”
Claim · model-written summary
AVG did not affect total GA-like substance contents.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AVG had no effect on the total GA-like substance contents.”
t0“Cymbidium Hybrids”
Claim · model-written summary
The authors suggest Cymbidium rhizome growth may be controlled by both GA activity and ethylene.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth characteristics of rhizomes in cymbidium plants may be controlled not only by GA activities but also by ethylene”
t0“Cymbidium Hybrids”
Claim · model-written summary
The authors propose controlling rhizome hormone levels to propagate mother stocks.
- Outcome
- propagate mother stocks by controlling the levels of plant hormones in rhizomese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is possible to propagate mother stocks by controlling the levels of plant hormones in rhizomes”
t0“Cymbidium Hybrids”