Growth Regulators in <i>Populus tremula</i>

Eliasson, Lennart

doi:10.1111/j.1399-3054.1971.tb03479.x

Cited by 13 publications

(6 citation statements)

References 24 publications

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“…1. Support for the inhibitor theory is found in the works of Eliasson (1971) and Tillberg (1974), who have both demonstrated that light-grown plants contain higher amounts of inhibitors than etiolated plants. Whether these growth inhibitors also act as inhibitors of root initiation has not been ascertained.…”

Section: Resultsmentioning

confidence: 91%

“…Trials have been made to relate this effect to changed auxin metabolism (Fletcher and Zalik 1964) and to the effect on the level of endogenous gibberellin (Lockhart 1959). Eliasson (1971) obtained results which indicate that light plays an important role in the synthesis of inhibitory substances in Populus tremula shoots. This may contribute to the suppression of stem growth.…”

Section: Resultsmentioning

confidence: 99%

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Root Formation of Pea Cuttings in Relation to the Irradiance of the Stock Plants

Hansen¹,

Eriksen²

1974

Physiologia Plantarum

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Pea plants were grown at different irradiances for eleven days. At this stage they were used for cuttings. The irradiance during the rooting period (155 mW · dm−2) was the same in all the experiments, Cuttings from stock plants cultivated at the weakest irradiance obtained the highest number of roots, and the poorest rooting appeared in cuttings from stock plants grown at the highest irradiance. The results indicate that the nutritional status of the stock plant is an important factor for root formation in the cutting. Light may influence the production of inhibitors which directly or indirectly affect root formation. The possible role of carbohydrates and growth promoters in the process of root formation is discussed.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Root Formation of Pea Cuttings in Relation to the Irradiance of the Stock Plants

Hansen¹,

Eriksen²

1974

Physiologia Plantarum

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“…Elongating suckers produce auxins whose translocation into the root inhibits the initiation and development of additional suckers (Eliasson 1971a, Schier 1972.…”

Section: Apical Dominancementioning

confidence: 99%

Aspen: Ecology and management in the western United States

DeByle¹,

Winokur²

1985

215

139

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Information about the biology, ecology, and management of quaking aspen on the mountains and plateaus of the interior western United States, and to a lesser extent, Canada, is summarized and discussed. The biology of aspen as a tree species, community relationships in the aspen ecosystem, environments, and factors affecting aspen forests are reviewed. The resources available within and from the aspen forest type, and their past and potential uses are examined. Silvicultural methods and other approaches to managing aspen for various resources and uses are presented.

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“…Much use is made in forestry of surgically-treated root suckers, stump sprouts and epicormic shoots to vegetatively propagate refractory species (Hartney 1980). Aspens can produce both adventitious roots and shoots and these physiological processes have been the subject of some detailed study (Eliasson 1971. Schier and Campbell 1976, 1978, However, less is known about the physiological processes involved in the rooting of stump sprouts from coppiced trees (Hartney 1980).…”

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confidence: 99%

The physiological role of abscisic acid in the rooting of poplar and aspen stump sprouts

Blake

Atkinson

1986

Physiologia Plantarum

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The better rooting performance of stump sprouts offers the means of mass‐producing rooted cuttings of many difficult‐to‐root genotypes. To study the physiological basis of rooting, stem cuttings were taken from stump sprouts of the more readily‐rooted hybrid poplar cultivar DN (P. deltoides × P. nigra) and the difficult‐to‐root aspen hybrid cultivar AE (P. alba × P. tremula). Seasonal variation in rooting percentage of both the AE and DN cultivars (higher in winter and lower in late summer and fall) of poplar was correlated with higher and lower levels of abscisic acid (ABA), respectively, in fractionated extracts of poplar. The presence of ABA in the purified inhibitory fraction was unequivocally confirmed by (i) co‐chromatography, (ii) gas chromatography‐electron capture detector and isomerization with UV light and (iii) combined negative chemical ionization‐mass spectrometry. Although ABA was identified in the inhibitory fractions of mung bean bioassays of both poplar and aspen extracts, exogenous ABA did not inhibit rooting when applied at physiological concentrations. Since ABA levels were higher in the more readily‐rooted hybrid poplar cultivar DN and were higher in February, close to the time of maximal rooting of cuttings, this suggests that ABA levels may possibly explain clonal and seasonal variation in rooting patterns of poplar stump sprouts. This interpretation is supported by the fact that lower, physiological concentrations increased rooting percentage, root number and root elongation when ABA was added to poplar and aspen cuttings.

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Growth Regulators in Populus tremula

Cited by 13 publications

References 24 publications

Root Formation of Pea Cuttings in Relation to the Irradiance of the Stock Plants

Root Formation of Pea Cuttings in Relation to the Irradiance of the Stock Plants

Aspen: Ecology and management in the western United States

The physiological role of abscisic acid in the rooting of poplar and aspen stump sprouts

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