Effect of light intensity and CO2 enrichment during in vitro rooting on subsequent growth of plantlets of strawberry, raspberry and asparagus in acclimatization

LaForge, F. B.; Lussier, Claudine; Desjardins, Yves; Gosselin, André

doi:10.1016/0304-4238(91)90009-n

Cited by 35 publications

(17 citation statements)

References 12 publications

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“…Sugars are considered as a source of metabolites and energy for the development of new leaves during the ex vitro acclimatization (Cappellades et al 1991, Van Huylenbroeck et al 1996. The highest starch amount accumulated in V+ myrtle plants could be explained by the photosynthetic activity during the in vitro culture and by a simultaneous feeding of exogenous sugar from the medium (Laforge et al 1991, Van Huylenbroeck et al 1996. For this reason, V+ plantlets were the most developed with the highest dry matter and the highest rooting percentage: starch could be employed to supply energy to growth.…”

Section: Discussionmentioning

confidence: 98%

Leaf ultrastructure, photosynthetic rate and growth of myrtle plantlets under different in vitro culture conditions

Lucchesini¹,

Monteforti²,

Mensuali-Sodi³

et al. 2006

Biologia plant.

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The in vitro rooting of myrtle (Myrtus communis L.) plantlets was performed in containers with gas permeable (V) and non-permeable (C) closures characterized by a different number of gas exchanges (1.4 and 0.3 h -1 , respectively). The rooting was induced on Perlite, soaked with half strength Murashige and Skoog (MS) medium with 0.5 mg dm -3 IBA, either with and without 15 g dm -3 of sucrose. During the rooting phase, it was demonstrated that C cultures without sucrose (C-) negatively affect the growth of myrtle plantlets. The net photosynthetic rate and the starch content showed the lowest values in C cultures with and without sucrose (C+ and C-) while chlorophyll a content did not vary among treatments, therefore it could not be considered an indicative parameter to evaluate the autotrophic metabolism in myrtle plantlets. Electron microscopy and image analysis were employed to evaluate the leaf ultrastructure at three sample dates. Plantlet rooted in vented vessels with and without sucrose (V+ and V-) showed chloroplasts with numerous starch inclusions, while several osmiophilic plastoglobules (frequently related with leaf senescence) were found in chloroplast of leaf cells of C-myrtle plantlets.

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Section: Discussionmentioning

confidence: 98%

Leaf ultrastructure, photosynthetic rate and growth of myrtle plantlets under different in vitro culture conditions

Lucchesini¹,

Monteforti²,

Mensuali-Sodi³

et al. 2006

Biologia plant.

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“…The range in relative R:S change for fruit crops was large, but they also showed an overall positive effect of elevated CO2 (Table 2). This overall positive (+16.0%) response was primarily due to large positive responses of raspberry (Rubus idaeus) plantlets (Laforge et al, 1991) and may have been an artifact of the young age of the plantlets and of experimental conditions specifically designed to study in vitro rooting of these young plantlets. If data for the raspberry plantlets are omitted, the overall average response for fruit crops becomes +1.0% which is more in line with the other crop types.…”

Section: Root To Shoot Ratio Of Crops As Influenced By Co2mentioning

confidence: 99%

“…Pot size was found to be unrelated to percent change in R:S (Pearson's correlation; n = 231 after removal of field data and those of Laforge et al (1991), R=0.03, Pr>R=0.65). It would seem logical that root restriction, due to small pot volume, would result in altered allocation patterns and reduced R:S, as was reported by Arp (1991) using substantially fewer data points from agronomic species as well as other plant types.…”

Section: Root To Shoot Ratio Of Crops As Influenced By Co2mentioning

confidence: 99%

Root to shoot ratio of crops as influenced by CO2

et al. 1995

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Crops of tomorrow are likely to grow under higher levels of atmospheric CO2. Fundamental crop growth processes will be affected and chief among these is carbon allocation. The root to shoot ratio (R:S, defined as dry weight of root biomass divided by dry weight of shoot biomass) depends upon the partitioning of photosynthate which may be influenced by environmental stimuli. Exposure of plant canopies to high CO2 concentration often stimulates the growth of both shoot and root, but the question remains whether elevated atmospheric CO2 concentration will affect roots and shoots of crop plants proportionally. Since elevated CO2 can induce changes in plant structure and function, there may be differences in allocation between root and shoot, at least under some conditions. The effect of elevated atmospheric CO2 on carbon allocation has yet to be fully elucidated, especially in the context of changing resource availability. Herein we review root to shoot allocation as affected by increased concentrations of atmospheric CO2 and provide recommendations for further research. Review of the available literature shows substantial variation in R:S response for crop plants. In many cases (59.5%) R:S increased, in a very few (3.0%) remained unchanged, and in others (37.5%) decreased. The explanation for these differences probably resides in crop type, resource supply, and other experimental factors. Efforts to understand allocation under CO2 enrichment will add substantially to the global change response data base.Abbreviations: R:S -root to shoot ratio, dry weight basis

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“…There is a report on the effects of CDE in acclimatization on plants treated with CDE during in vitro culture [55] . It seems that the growth of the plantlets which were treated with high CO2 concentrations in vitro is also enhanced in the acclimatization stage.…”

Section: 1 Carbon Dioxide Enrichment (Cde)mentioning

confidence: 99%

Components of the gaseous environment and their effects on plant growth and development in vitro

Buddendorf-Joosten

Woltering²

1994

Plant Growth Regul

107

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Effect of light intensity and CO2 enrichment during in vitro rooting on subsequent growth of plantlets of strawberry, raspberry and asparagus in acclimatization

Cited by 35 publications

References 12 publications

Leaf ultrastructure, photosynthetic rate and growth of myrtle plantlets under different in vitro culture conditions

Leaf ultrastructure, photosynthetic rate and growth of myrtle plantlets under different in vitro culture conditions

Root to shoot ratio of crops as influenced by CO2

Components of the gaseous environment and their effects on plant growth and development in vitro

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