Interactive effects of mycorrhization and elevated carbon dioxide on growth of young pedunculate oak (Quercus robur L.) trees

Seegmüller, S.; Rennenberg, Heinz

doi:10.1007/bf00007960

Cited by 26 publications

(13 citation statements)

References 16 publications

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“…Considerable effects of atmospheric CO 2 concentration, mycorrhization or drought on the root-to-shoot ratio and the bark-to-wood ratio of the stem or the root were not observed (data not shown). Similar results on the effects of elevated CO 2 , mycorrhization and drought on the growth of trees were observed using two growth chambers different from those used in the present study for the control and the elevated CO 2 atmosphere (Seegmüller & Rennenberg 1994).…”

Section: Water Status and Growth Of The Treessupporting

confidence: 87%

“…Mycorrhization also affects the response of biomass accumulation of trees to elevated CO 2 . Both mycorrhization of young pedunculate oak trees and elevated CO 2 enhance growth; in combination a more than additive positive effect on tree height and biomass accumulation was found (Seegmüller & Rennenberg 1994). Thus, the availability of nutrients for growth and development at elevated CO 2 seems to be improved in oak trees as a consequence of mycorrhization.…”

Section: Introductionmentioning

confidence: 90%

“…Increased yield and biomass production at elevated atmospheric CO 2 concentrations has been observed in more than 430 studies with cultured plant species (Kimball 1983) and numerous woody plants (Mousseau & Saugier 1992;Gunderson et al 1993;Seegmüller & Rennenberg 1994). However, at prolonged exposure to elevated CO 2 a decline of the initially enhanced rate of photosynthesis was found in several studies (Sasek et al 1985;Thomas & Strain 1991).…”

Section: Introductionmentioning

confidence: 99%

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Interactive effects of elevated atmospheric CO₂, mycorrhization and drought on long‐distance transport of reduced sulphur in young pedunculate oak trees (Quercus robur L.)

Schulte

Herschbach

Rennenberg

1998

Plant Cell & Environment

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Pedunculate oak (Quercus robur L.) was germinated and grown under nutrient non-limiting conditions for a total of 10-15 weeks at ambient CO 2 concentration and 1100 µmol mol -1 CO 2 either in the presence or the absence of the mycorrhizal fungus Laccaria laccata. Half of the oak trees of these treatments were exposed to drought during final growth by suspending the water supply for 21 d. Mycorrhization and elevated atmospheric CO 2 each enhanced total plant biomass per tree. Whereas additional biomass accumulation of trees grown under elevated CO 2 was mainly attributed to increased growth of lateral roots, mycorrhization promoted shoot growth. Water deficiency reduced biomass accumulation without affecting relative water content, but this effect was more pronounced in mycorrhizal as compared to non-mycorrhizal trees. Elevated CO 2 partially prevented the development of drought stress, as indicated by leaf water potential, but did not counteract the negative effects of water deficiency on growth during the time studied. Enhanced biomass accumulation requires adaption in protein synthesis and, as a consequence, enhanced allocation of reduced sulphur produced in the leaves to growing tissues. Therefore, allocation of reduced sulphur from oak leaves was studied by flapfeeding radiolabelled GSH, the main long-distance transport form of reduced sulphur, to mature oak leaves. Export of radiolabel proceeded almost exclusively in basipetal direction to the roots. The rate of export of radioactivity out of the fed leaves was significantly enhanced under elevated CO 2 , irrespective of mycorrhization. A higher proportion of the exported GSH was transported to the roots than to basipetal stem sections under elevated CO 2 as compared to ambient CO 2 . Mycorrhization did not affect 35 S export out of the fed leaves, but the distribution of radiolabel between stem and roots was altered in preference of the stem. Trees exposed to drought did not show appreciable export of the 35 S radioactivity fed to the leaves when grown under ambient CO 2 . Apparently, drought inhibited basipetal transport of reduced sulphur at the level of phloem loading and/or phloem transport. Elevated CO 2 seemed to counteract this effect of drought stress to some extent, since higher leaf water potentials and improved 35 S export out of the fed leaves was observed in oak trees exposed to drought and elevated CO 2 as compared to trees exposed to drought and ambient CO 2 .

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Section: Water Status and Growth Of The Treessupporting

confidence: 87%

Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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Interactive effects of elevated atmospheric CO₂, mycorrhization and drought on long‐distance transport of reduced sulphur in young pedunculate oak trees (Quercus robur L.)

Schulte

Herschbach

Rennenberg

1998

Plant Cell & Environment

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“…1). Previous studies have also found that ectomycorrhizal development in seedlings of several tree species at EC was greater than at AC (Seegmüller and Rennenberg 1994, Ineichen et al 1995, Rey and Jarvis 1997, Runion et al 1997. Effect of ectomycorrhizal inoculation by Pt on the shoot and root dry mass, diameter, inoculation rate, P content, water use efficiency (WUE), and stomatal limitation (l s ) of P. densiflora seedlings grown at 360 µmol mol -1 (AC) or 720 µmol mol -1 (EC).…”

Section: Discussionmentioning

confidence: 96%

Effect of ectomycorrhizal infection on growth and photosynthetic characteristics of Pinus densiflora seedlings grown under elevated CO<sub>2</sub> concentrations

Choi¹,

Quoreshi²,

Maruyama³

et al. 2005

Photosynt.

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The effect of ectomycorrhizal Pisolithus tinctorius (Pt) infection was studied on the growth and photosynthetic characteristics of Pinus densiflora seedlings grown at ambient (360 µmol mol -1 , AC) and elevated (720 µmol mol -1 , EC) CO 2 concentrations. After 18 weeks, Pt inoculation had led to significantly increased dry mass and stem diameter of P. densiflora at both CO 2 concentrations, relative to non-inoculated seedlings. Moreover, EC significantly increased the ectomycorrhizal development. The phosphate content in needles inoculated with Pt was about three times higher than without inoculation at both CO 2 concentrations. The PAR saturated net photosynthetic rates (P sat ) of P. densiflora inoculated with Pt were clearly higher than for control seedlings at both CO 2 concentrations, and the maximum net photosynthetic rate (P N ) at saturated CO 2 concentration (P max ) was higher than in controls. Moreover, the carboxylation efficiency (CE) and RuBP regeneration rate of the P N /C i curve for P. densiflora inoculated with Pt were significantly higher than for non-inoculated seedlings at both CO 2 concentrations, especially at EC. The water use efficiency (WUE) of seedlings inoculated with Pt grown at EC was significantly raised. Allocation of photosynthates to roots was greater in Pt inoculated pine seedlings, because of the enhanced activity of ectomycorrhiza associated with seedlings at EC. Moreover, P N of non-inoculated seedlings grown for 18 weeks at EC tended to be down regulated; in contrast, Pt inoculated seedlings showed no down-regulation at EC. The activity of ectomycorrhiza may therefore be enhanced physiological function related to water and phosphate absorption in P. densiflora seedlings at EC.

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“…Acorns of Q. ilex from both the control and spring site were germinated and cultivated in growth tubes, 8 cm in diameter and 40 cm in length (Seegmüller & Rennenberg 1994). To avoid uncontrolled mycorrhization the substrate was inoculated with Laccaria laccata (Polle et al .…”

Section: Methodsmentioning

confidence: 99%

Life‐long growth of Quercus ilex L. at natural CO₂ springs acclimates sulphur, nitrogen and carbohydrate metabolism of the progeny to elevated pCO₂

Schulte¹,

Ballmoos²,

Rennenberg³

et al. 2002

Plant Cell & Environment

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The aim of the present study was to analyse whether offspring of mature Quercus ilex trees grown under life-long elevated p CO 2 show alterations in the physiological response to elevated p CO 2 in comparison with those originating from mature trees grown at current ambient p CO 2 . To investigate changes in C-(for changes in photosynthesis, biomass and lignin see Polle, McKee & Blaschke Plant, Cell and Environment 24, 1075-1083, 2001), N-, and Smetabolism soluble sugar, soluble non-proteinogenic nitrogen compounds (TSNN), nitrate reductase (NR), thiols, adenosine 5 ¢ -phosphosulphate (APS) reductase, and anions were analysed. For this purpose Q. ilex seedlings were grown from acorns of mother tree stands at a natural spring site (elevated p CO 2 ) and a control site (ambient p CO 2 ) of the Laiatico spring, Central Italy. Short-term elevated p CO 2 exposure of the offspring of control oaks lead to higher sugar contents in stem tissues, to a reduced TSNN content in leaves, and basipetal stem tissues, to diminished thiol contents in all tissues analysed, and to reduced APS reductase activity in both, leaves and roots. Most of the components of C-, N-and S-metabolism including APS reductase activity which were reduced due to short-term elevated p CO 2 exposure were recovered by life-long growth under elevated p CO 2 in the offspring of spring oaks. Still TSNN contents in phloem exudates increased, nitrate contents in lateral roots and glutathione in leaves and phloem exudates remained reduced in these plants. The present results demonstrated that metabolic adaptations of Q. ilex mother trees to elevated p CO 2 can be passed to the next generation. Short-and long-term effects on source-to-sink relation and physiological and genetic acclimation to elevated p CO 2 are discussed.

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Interactive effects of mycorrhization and elevated carbon dioxide on growth of young pedunculate oak (Quercus robur L.) trees

Cited by 26 publications

References 16 publications

Interactive effects of elevated atmospheric CO₂, mycorrhization and drought on long‐distance transport of reduced sulphur in young pedunculate oak trees (Quercus robur L.)

Interactive effects of elevated atmospheric CO₂, mycorrhization and drought on long‐distance transport of reduced sulphur in young pedunculate oak trees (Quercus robur L.)

Effect of ectomycorrhizal infection on growth and photosynthetic characteristics of Pinus densiflora seedlings grown under elevated CO<sub>2</sub> concentrations

Life‐long growth of Quercus ilex L. at natural CO₂ springs acclimates sulphur, nitrogen and carbohydrate metabolism of the progeny to elevated pCO₂

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Interactive effects of mycorrhization and elevated carbon dioxide on growth of young pedunculate oak (Quercus robur L.) trees

Cited by 26 publications

References 16 publications

Interactive effects of elevated atmospheric CO2, mycorrhization and drought on long‐distance transport of reduced sulphur in young pedunculate oak trees (Quercus robur L.)

Interactive effects of elevated atmospheric CO2, mycorrhization and drought on long‐distance transport of reduced sulphur in young pedunculate oak trees (Quercus robur L.)

Effect of ectomycorrhizal infection on growth and photosynthetic characteristics of Pinus densiflora seedlings grown under elevated CO<sub>2</sub> concentrations

Life‐long growth of Quercus ilex L. at natural CO2 springs acclimates sulphur, nitrogen and carbohydrate metabolism of the progeny to elevated pCO2

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Interactive effects of elevated atmospheric CO₂, mycorrhization and drought on long‐distance transport of reduced sulphur in young pedunculate oak trees (Quercus robur L.)

Interactive effects of elevated atmospheric CO₂, mycorrhization and drought on long‐distance transport of reduced sulphur in young pedunculate oak trees (Quercus robur L.)

Life‐long growth of Quercus ilex L. at natural CO₂ springs acclimates sulphur, nitrogen and carbohydrate metabolism of the progeny to elevated pCO₂