Effect of photon flux density on carbon assimilation and chlorophyll a fluorescence of cold-stored white spruce and lodgepole pine seedlings

Camm, Edith L.; Harper, George J.; Rosenthal, Selma I.; Camm, D. M.

doi:10.1093/treephys/12.2.185

Cited by 9 publications

(4 citation statements)

References 13 publications

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“…5) would suggest that processes other than electron transport were limiting CO 2 assimilation. Camm et al (1993) stated that chlorophyll breakdown may be responsible for the reduced photosynthetic capacity of seedlings stored in complete darkness; however, our results seem to eliminate this possibility because only in BR seedlings stored at 10°C, was an 18% decrease of photosynthetic pigments observed (data not shown). Consequently, photochemical apparatus may be damaged as a result of the alteration in membrane lipid composition (Zwiazek and Blake 1990).…”

Section: Gas Exchange Parameterscontrasting

confidence: 72%

Gas exchange and chlorophyll fluorescence responses of Pinus radiata D. Don seedlings during and after several storage regimes and their effects on post-planting survival

Mena‐Petite

Robredo

Alcalde

et al. 2003

Trees

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Post-storage gas exchange parameters like CO 2 assimilation, stomatal conductance, transpiration, water use efficiency and intercellular CO 2 concentrations, together with several chlorophyll a fluorescence parameterswere examined in radiata pine (Pinus radiata D. Don) seedlings that were stored for 1, 8 or 15 days at 4°or 10°C with or without soil around the roots. Results were analysed in relation to post-storage water potential and electrolyte leakage in order to forecast their vitality (root growth potential) following cold storage, and post-planting survival potential under optimal conditions. During storage at 4°and 10°C, photosynthesis was reduced, being more pronounced in bare-root seedlings than in seedlings with soil around the roots. The depletion of CO 2 assimilation seemed not to be solely a stomatal effect as effects on chloroplasts contributed to this photosynthetic inhibition. Thus, the fall in the ratios F v /F m , F v /F o and F m /F o indicated photochemical apparatus damage during storage. Photosynthetic rate was positively correlated with the root growth index and new root length showing that new root growth is dependent primarily on current photosynthesis. Pre-planting exposure of bare-root radiata pine seedlings to temperatures of 10°C for more than 24 h during transportation or storage is not recommended.

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Section: Gas Exchange Parameterscontrasting

confidence: 72%

Gas exchange and chlorophyll fluorescence responses of Pinus radiata D. Don seedlings during and after several storage regimes and their effects on post-planting survival

Mena‐Petite

Robredo

Alcalde

et al. 2003

Trees

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“…Immediate exposure of dark‐stored white spruce seedlings to high light intensities after 6 months of storage resulted in a decline in net photosynthesis, as compared to plants exposed to low light levels, which started to increase net photosynthesis after cold storage (Camm et al . ). Hou et al .…”

Section: Discussionmentioning

confidence: 97%

Cold storage to overcome dormancy affects the carbohydrate status and photosynthetic capacity of Rhododendron simsii

Christiaens

Keyser²,

Lootens³

et al. 2014

Plant Biol J

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Global warming leads to increasing irregular and unexpected warm spells during autumn, and therefore natural chilling requirements to break dormancy are at risk. Controlled cold treatment can provide an answer to this problem. Nevertheless, artificial cold treatment will have consequences for carbon reserves and photosynthesis. In this paper, the effect of dark cold storage at 7 °C to break flower bud dormancy in the evergreen Rhododendron simsii was quantified. Carbohydrate and starch content in leaves and flower buds of an early ('Nordlicht'), semi-early ('M. Marie') and late ('Mw. G. Kint') flowering cultivar showed that carbon loss due to respiration was lowest in 'M. Marie', while 'Mw. G. Kint' was completely depleted of starch reserves at the end of cold treatment. Gene isolation resulted in a candidate gene for sucrose synthase (SUS) RsSus, which appears to be homologous to AtSus3 and had a clear increase in expression in leaves during cold treatment. Photosynthesis measurements on 'Nordlicht' and the late-flowering cultivar 'Thesla' showed that during cold treatment, dark respiration decreased 58% and 63%, respectively. Immediately after cold treatment, dark respiration increased and stabilised after 3 days. The light compensation point followed the same trend as dark respiration. Quantum efficiency showed no significant changes during the first days after cold treatment, but was significantly higher than in plants with dormant flower buds at the start of cold treatment. In conclusion, photosynthesis stabilised 3 days after cold treatment and was improved compared to the level before cold treatment.

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“…There was a decline in absolute shoot WC during this period (Figure 1), suggesting that the seedlings may have experienced water stress during storage. In other conifers, water stress (Mena-Petite et al 2001), chlorophyll breakdown during (dark) storage or other factors caused damage during storage (Camm et al 1993;Maki & Colombo 2001). A decline in Fv/Fm to less than 0.60 was accompanied by an increase in seedling mortality ( Figure 3).…”

Section: Discussionmentioning

confidence: 99%

Rapidly detecting the effects of warm storage stress on Douglas fir seedlings

Harper

O'Reilly

Perks

2010

Plant Biosystems - An International Journal Dealing with all As

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The physiological response of 3-year-old Douglas fir (Pseudotsuga menziesii[Mirb.] Franco) transplanted seedlings lifted to warm (158C) (i.e. simulated ambient) storage in November, January and March in Ireland was investigated, with an aim of developing rapid methods for detecting stress. Chlorophyll fluorescence (CF), root electrolyte leakage (REL), shoot and root water content (WC), dry weight (DW), root growth potential (RGP) and survival were assessed. CF declined as the duration of warm storage increased and this was greatest for the November-lifted stock. CF measurements were closely related to survival in the greenhouse. Shoot tip and taproot DW declined during warm storage for stock lifted in November and March. Warm storage had no effect on shoot DW and caused a small decline in root DW for stock lifted in January. Changes in WC during storage were greater in the roots than in shoots, and values were significantly lower in treated plants following 21-day storage than in the controls (no storage). In conclusion, the results suggested that CF could be used to detect the effect of ambient storage stress (simulated by warm storage) on Douglas fir seedling vitality, and was more a more reliable indicator of plant quality than the other parameters.

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Effect of photon flux density on carbon assimilation and chlorophyll a fluorescence of cold-stored white spruce and lodgepole pine seedlings

Cited by 9 publications

References 13 publications

Gas exchange and chlorophyll fluorescence responses of Pinus radiata D. Don seedlings during and after several storage regimes and their effects on post-planting survival

Gas exchange and chlorophyll fluorescence responses of Pinus radiata D. Don seedlings during and after several storage regimes and their effects on post-planting survival

Cold storage to overcome dormancy affects the carbohydrate status and photosynthetic capacity of Rhododendron simsii

Rapidly detecting the effects of warm storage stress on Douglas fir seedlings

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