Thermomorphogenesis in Lilium longiflorum

Erwin, John E.; Heins, Royal D.; Karlsson, Meriam G.

doi:10.2307/2444772

Cited by 70 publications

(29 citation statements)

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“…Erwin et al (1989) showed that the effects of diurnal temperature alternation on stem length in Lilium longiflorum could best be described by the mathematical difference (DIF) between day temperature (DT) and night temperature (NT). Stem elongation thus increases with an increase in DIF, from a negative to a positive value.…”

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confidence: 99%

Thermoperiodic Stem Elongation Involves Transcriptional Regulation of Gibberellin Deactivation in Pea

et al. 2005

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The physiological basis of thermoperiodic stem elongation is as yet poorly understood. Thermoperiodic control of gibberellin (GA) metabolism has been suggested as an underlying mechanism. We have investigated the influence of different day and night temperature combinations on GA levels, and diurnal steady-state expression of genes involved in GA biosynthesis (LS, LH, NA, PSGA20ox1, and PsGA3ox1) and GA deactivation (PsGA2ox1 and PsGA2ox2), and related this to diurnal stem elongation in pea (Pisum sativum L. cv Torsdag). The plants were grown under a 12-h light period with an average temperature of 17°C. A day temperature/night temperature combination of 13°C/21°C reduced stem elongation after 12 d by 30% as compared to 21°C/13°C. This was correlated with a 55% reduction of GA 1 . Although plant height correlated with GA 1 content, there was no correlation between diurnal growth rhythms and GA 1 content. NA, PsGA20ox1, and PsGA2ox2 showed diurnal rhythms of expression. PsGA2ox2 was up-regulated in 13°C/21°C (compared to 21°C/13°C), at certain time points, by up to 19-fold. Relative to PsGA2ox2, the expression of LS, LH, NA, PSGA20ox1, PsGA3ox1, and PsGA2ox1 was not or only slightly affected by the different temperature treatments. The sln mutant having a nonfunctional PsGA2ox1 gene product showed the same relative stem elongation response to temperature as the wild type. This supports the importance of PsGA2ox2 in mediating thermoperiodic stem elongation responses in pea. We present evidence for an important role of GA catabolism in thermoperiodic effect on stem elongation and conclude that PsGA2ox2 is the main mediator of this effect in pea.The ability of plants to discriminate between temperature during the day and night in their response to flowering, fruiting, and growth is referred to as thermoperiodism (Went, 1944). Erwin et al. (1989) showed that the effects of diurnal temperature alternation on stem length in Lilium longiflorum could best be described by the mathematical difference (DIF) between day temperature (DT) and night temperature (NT). Stem elongation thus increases with an increase in DIF, from a negative to a positive value. Stem elongation in many species is affected by the relationship between DT and NT, and the DIF concept is widely used for growth control in production of ornamental plants propagated in a greenhouse (Erwin and Heins, 1995;Myster and Moe, 1995;Moe and Heins, 2000). A negative DIF treatment (low DT and high NT) is a tool to produce compact flower plants and vegetable seedlings with short internodes without a delay in production time. Also, negative DIF treatments have largely replaced the use of chemical growth retardants in a number of commercial cultures.Thus, the use of such temperature regimes has substantial practical and economic implications in addition to representing an environmentally more sustainable method than chemical growth control. However, very little is known about the mechanisms underlying the thermoperiodic responses in plants. Such knowledge will be of gr...

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Thermoperiodic Stem Elongation Involves Transcriptional Regulation of Gibberellin Deactivation in Pea

et al. 2005

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“…4). However, regarding stem length, high DT (Table 2) and low NT (Table 4) conditions, especially the latter, produced a significantly long stem length in lily plants, which may be a result of the "positive DIF effect" (Blom & Kerec 2003, Erwin et al 1989. The elongated stems of plants grown under high DT of 28°C might be considered "succulent elongation" because such growth was accompanied by a low DW/FW ratio (Table 2).…”

Section: Discussionmentioning

confidence: 99%

The Effects of Day and Night Temperature on the Dry Matter Accumulation of Oriental Hybrid Lily ‘Siberia’ as they Relate to the Photosynthetic and Respiratory Characteristics

Inamoto

Nagasuga

Yano

et al. 2016

JARQ

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The net photosynthetic rate on a per-plant basis of the Oriental hybrid lily 'Siberia' was low at the leafing stage but increased rapidly at the visible flower bud and flowering stages. The range of 20 to 25°C was the optimum temperature for photosynthesis at the three plant developmental stages under PPFD of 700 to 850 µmol photons m -2 s -1. The respiration rate increased with the increasing temperature quadratically (in aerial plant parts) or exponentially (in underground parts). The 'Siberia' plants were grown under three day temperature (DT) conditions of 28°C, 24°C or 20°C, with a night temperature (NT) of 15°C or three NTs of 25°C, 20°C or 15°C, with DT of 25°C in the growth chambers. At the flowering stage, the plants grown under low DT of 20°C had a high dry weight (DW) of the total plant, flowers, bulb, and roots, and a high DW/fresh weight (FW) ratio of the leaves, stem, and bulb. The plants grown under low NT of 15°C had a high DW of the total plant and stem, and a high DW/FW ratio of the leaves and bulb. The plants that were grown under a low NT had a long stem length by the positive DIF effect, which was supported by sufficient dry mater accumulation. The plants grown under low DT of 20°C showed a high relative growth rate (RGR) and net assimilation rate (NAR) from planting to flowering, whereas the NT condition did not affect the RGR or NAR.

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“…2) These results suggest the possible involvement of GA in the thermoperiodic regulation of stem elongation. The concentration of endogenous GAl' the probable biologically-active GA, was higher with positive DIF than with negative DIF in C. isophylla (R. Moe, personal communication).…”

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confidence: 81%

“…Went l ) has shown that the day temperature (DT) and night temperature (NT) affected the stem elongation rate. Further, Erwin et al 2 ) have shown that the stem elongation rate of Lilium longiflorum was correlated with the difference between DT and NT (DIF=DT-NT), and that the stem elongation rate decreased with decreasing DIF. Thereafter, it was found that the stem elongation rate of many plant species were correlated with DIF.3 5) Not only the alternation of entire day and night temperatures, but also several hours of temperature increase and decrease (this decrease is called 'temperature drop') around the beginning of the light period also increased and decreased stem elongation respectively.…”

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Role of Gibberellins in the Thermoperiodic Regulation of Stem Elongation inDendranthema grandiflorumTzvelev

Nishijima

Nonaka

Koshioka

et al. 1997

Bioscience, Biotechnology, and Biochemistry

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Thermomorphogenesis in Lilium longiflorum

Cited by 70 publications

References 0 publications

Thermoperiodic Stem Elongation Involves Transcriptional Regulation of Gibberellin Deactivation in Pea

Thermoperiodic Stem Elongation Involves Transcriptional Regulation of Gibberellin Deactivation in Pea

The Effects of Day and Night Temperature on the Dry Matter Accumulation of Oriental Hybrid Lily ‘Siberia’ as they Relate to the Photosynthetic and Respiratory Characteristics

Role of Gibberellins in the Thermoperiodic Regulation of Stem Elongation inDendranthema grandiflorumTzvelev

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