Gibberellin Mutants in Pisum and Lathyrus

Reid, James B.; Ross, John J.

doi:10.1007/978-1-4612-3002-1_5

Cited by 7 publications

(5 citation statements)

References 29 publications

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“…(Moe 1990) and some other species as well (Erwin et al 1989) suggest an involvement of GA in the thermoperiodic regulation of elongation growth. In addition to effects on the levels of bioactive GAs, changes in tissue sensitivity to GA can be influenced by environmental factors (Nick and Furuya 1993, Pinthus et al 1989, Reid and Ross 1991. The mode of action of GA is not known, but both cell division and cell elongation can be affected.…”

Section: Discussionmentioning

confidence: 99%

“…These results suggest that GAs might be involved in thermoperiodic regulation of stem elongation. GA 1 has been suggested to be one of the effector GAs of elongation growth in higher plants (Graebe 1987, Phinney 1984, Reid and Ross 1991. A number of studies indicate that photoperiodic control of elongation growth could be related to photoperiodic regulation of biosynthesis of GA 1 (Gilmour et al 1986, Junttila and Jensen 1988, Metzger and Zeevaart 1986, Olsen et al 1994, Talon and Zeevaart 1990, Zeevaart et al 1991).…”

mentioning

confidence: 99%

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Thermoperiodic control of stem elongation and endogenous gibberellins in Campanula isophylla

Jensen

Eilertsen

Ernsten

et al. 1996

J Plant Growth Regul

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The effect of day/night temperature regimes on stem elongation and on the content of endogenous gibberellins (GAs) in vegetatively propagated plants of Campanula isophylla cv. Hvit have been studied. Compared with a constant temperature regime at 18~ (18/ 18~ stem and internode elongation was enhanced significantly by a combination of high day/low night temperature (21/15~ and inhibited by an opposite regime (15/21~ Gibberellins A 1, At9, A44, A53, and A97 were identified as endogenous components in Campanula.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Thermoperiodic control of stem elongation and endogenous gibberellins in Campanula isophylla

Jensen

Eilertsen

Ernsten

et al. 1996

J Plant Growth Regul

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“…T he plant growth regulator trinexapac-ethyl (TE) is widely used to suppress clipping yield on all commonly managed turfgrass species (Table 1). Trinexapac-ethyl suppresses clipping yield by inhibiting gibberellic acid (GA) synthesis through inhibition of GA 20 conversion to GA 1 , the bio-active gibberellin in cool-season turfgrasses (Reid and Ross, 1991;Rademacher, 2000). As a result, cell elongation decreases while GA 20 and total nonstructural carbohydrates (TNC) increase in concentration (Han et al, 1998(Han et al, , 2004Tan and Qian, 2003).…”

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confidence: 99%

A Growing Degree Day Model to Schedule Trinexapac‐ethyl Applications on Agrostis stolonifera Golf Putting Greens

Kreuser

Soldat

2011

Crop Science

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Trinexapac-ethyl (TE) is a widely used growth regulator in the turfgrass industry. Poor summer efficacy has been related to more rapid metabolism in the plant. The purpose of this study was to determine if a growing degree day (GDD) model could be used to identify the optimum TE reapplication interval for putting greens. This objective was accomplished through model development and validation. Model development was conducted on a creeping bentgrass {Agrostis stolonifera L.) golf putting green in Madison, Wl, during 2008. The treatments consisted of five TE reapplication intervals (100, 200, 400, 800 GDD, and 4 wk) and a control. Growing degree days were calculated in degrees G with a base temperature of 0°G. Trinexapac-ethyl was applied at the rate of 0.05 kg a.i. ha"^ Clippings were collected daily. The 100-and 200-GDD reapplication intervals provided consistent 20 and 12% yield suppression, respectively. Other reapplication intervals had alternating periods of yield reduction followed by yield enhancement. Model validation occurred on a different creeping bentgrass green in 2009 and 2010. The experiment was a 3 X 2 factorial GRD with three TE rates (0.00, 0.05, and 0.10 kg a.i. ha"^) and two reapplication frequencies (200 GDD and 4 wk). The 200-GDD interval consistently suppressed clipping yield. Application rate had no effect on the duration of suppression. Reapplying TE every 200 GDD provides more consistent growth regulation than a calendar-based application schedule.

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“…However, in grass species, GA 1 is primarily responsible for shoot and leaf elongation. GA 20 is the immediate precursor of GA 1 (Reid and Ross, 1991).…”

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confidence: 99%

Light Intensity Affects Gibberellic Acid Content in Kentucky Bluegrass

Tan¹,

Qian²

2003

HortSci

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Turfgrasses grown under low light conditions generally exhibit increased shoot elongation. Gibberellic acids (GAs), GA1 in particular, promote stem elongation in grass species. GA20 is the immediate precursor of GA1. However, a direct quantitative measurement of GA1 and GA20 has not been reported for turfgrass under different light intensities. This study was conducted in a greenhouse to quantify the endogenous levels of GA1 and GA20 of `KenblueTimes', `Livingston', and `NuGlade' Kentucky bluegrass (Poa pratensis L.) under two light intensities with and without trinexapacethyl (TE) application. GA1 and GA20 content in leaf tissue were analyzed using gas chromatography-mass spectrometry with deuterium-labeled GA1 and GA20 as internal standards. Light reduction of 73% under greenhouse conditions increased GA1 by 44% to 47% and GA20 by 16% to 50%. `NuGlade' had a GA1 content 20% lower than that of `Kenblue', suggesting that the dwarf characteristics of `NuGlade' may be related to its low GA1 content. The application of TE (0.1 kg·ha-1) reduced GA1 concentration by 47%, but increased GA20 concentration by 146%, supporting the contention that TE inhibited GA1 biosynthesis by blocking the conversion of GA20 to GA1. Chemical names used: 4-(cyclopropyl- -hydroxy-methylene)-3,5-dioxo-cyclohexanecarboxylic acid ethyl ester (trinexapac-ethyl); gibberellic acid (GA).

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Gibberellin Mutants in Pisum and Lathyrus

Cited by 7 publications

References 29 publications

Thermoperiodic control of stem elongation and endogenous gibberellins in Campanula isophylla

Thermoperiodic control of stem elongation and endogenous gibberellins in Campanula isophylla

A Growing Degree Day Model to Schedule Trinexapac‐ethyl Applications on Agrostis stolonifera Golf Putting Greens

Light Intensity Affects Gibberellic Acid Content in Kentucky Bluegrass

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