Effect of Age of Leaves Upon the Rate of Photosynthesis in Some Conifers

Freeland, R. O.

doi:10.1104/pp.27.4.685

Cited by 106 publications

(56 citation statements)

References 5 publications

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“…4a, c). A decrease in P with the foliage age has been reported by many authors (Freeland 1952;Weikert et al 1989;Wang et al 1995;Kitajima et al 1997;Oleksyn et al 1997;Jach and Ceulemans 2000;Crous and Ellsworth 2004;Warren 2006). However, the foliage age and the current light environment are correlated within a canopy and it is difficult to distinguish the age effect from the acclimation to current light conditions.…”

Section: Discussionmentioning

confidence: 96%

“…Long-lived conifer trees from the genus Picea and Pinus have often been used to study needle age effects on photosynthesis (Kayama et al 2007;Han et al 2008 and the citations above). In contrast, little attention has been paid to the research of the genus Abies (Freeland 1952;Brooks et al 1996). Kayama et al (2007) have found that in five species from the genus Picea high growth rates are related with high net CO 2 assimilation rates in young needles, high needle nitrogen concentration and short needle life spans.…”

Section: Introductionmentioning

confidence: 99%

“…and Gord., Pinus ponderosa Laws., Pinus nigra Arnold, Pinus strobus L., Picea pungens Engelm. (Freeland 1952), Picea abies (L.) Karst. (Weikert et al 1989), Pinus sylvestris L. (Freeland 1952;Wang et al 1995;Jach and Ceulemans 2000), Abies amabilis (Dougl.)…”

Section: Introductionmentioning

confidence: 99%

“…(Freeland 1952), Picea abies (L.) Karst. (Weikert et al 1989), Pinus sylvestris L. (Freeland 1952;Wang et al 1995;Jach and Ceulemans 2000), Abies amabilis (Dougl.) Forbes (Brooks et al 1996), Pinus heldreichii Christ (Oleksyn et al 1997), Pinus taeda L. (Crous and Ellsworth 2004), Pinus pinaster Aiton (Warren 2006), Pinus densiflora Sieb.…”

Section: Introductionmentioning

confidence: 99%

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Needle age dependence of photosynthesis along a light gradient within an Abies alba crown

Robakowski

Bielinis

2017

Acta Physiol Plant

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Age and shade effects on needle structure and photosynthesis were determined within a lower part of Abies alba crown along a horizontal increasing gradient of branches self-shading. It was hypothesized that a decrease in net CO 2 assimilation rate with increasing needles' age would be related to: (1) structural age-related changes in needles, (2) reduction of stomatal conductance, (3) nitrogen translocation from old to young needles, and (4) decrease in efficiency of photochemical processes. Leaf mass-to-area ratio increased non-linearly with needle age. In a needle cross section, distance between the vascular bundles decreased, and height of palisade parenchyma cells increased with age. The structural changes observed in our study might lead to an increase in internal resistance to CO 2 with greater needle age. Total needle nitrogen concentration linearly decreased with age due to dilution and/ or translocation to younger needles. When expressed per needle area, nitrogen content was reduced in 6-year-old needles compared with younger ones. Net CO 2 assimilation rate per needle area decayed and was accompanied by a decrease in transpiration and water and photosynthetic nitrogen use efficiency. Old needles maintained high photochemical efficiency which compensated to some extent for light deficit in their micro-light environments. Our results have suggested that there is a mechanism controlling the relation between efficiency of light and dark photosynthetic processes along the needle age and shade gradient in A. alba crown.Keywords Chlorophyll a fluorescence Á Leaf age Á Needle structure Á Nitrogen concentration Á Photosynthesis Á Silver fir

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Needle age dependence of photosynthesis along a light gradient within an Abies alba crown

Robakowski

Bielinis

2017

Acta Physiol Plant

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“…In leaves of dicotyledon plants after an initial rise (3), the photosynthetic capacity gradually declines after leaf expansion (6,16,19,20 …”

Section: Introductionmentioning

confidence: 99%

Functional and Structural Changes in Senescing Populus deltoides (Bartr.) Chloroplasts

Hernández-Gil¹,

Schaedle²

1973

Plant Physiol.

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Chloroplasts isolated from Populus deltoides leaves were used to study age-dependent changes in the rate of cyclic photophosphorylation. Single leaves were used to measure C02 fixation by leaf discs, chlorophyll concentration, and ATP synthesis. The ability of chloroplasts to synthesize ATP diminished steadily from the time of full leaf expansion, regardless whether the results are expressed on a leaf area or chlorophyll basis. This decline in the rates of ATP synthesis was paralleled by the decline in the rate of C02 fixation. The results suggest that the efficiency of the membrane-bound ATP synthesizing system declines with age.Photosynthetic and respiratory rates vary with leaf age (8,13,14,22,23,26). In leaves of dicotyledon plants after an initial rise (3), the photosynthetic capacity gradually declines after leaf expansion (6,16,19,20

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Physiological Effects of Manganese Deficiency Related to Age in Soybeans (Glycine Max)

Cooper

Girton

1963

American J of Botany

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COOPER, EUGENE E., and RAYMOND E. GIRTON. (Purdue U., Lafayette, Ind.) Physiological effects of manganese deficiency related to age in soybeans (Glycine max). Amer. Jour. Bot. 50(2): 105-110. Illus. 1963.-Soybean plants when grown in manganese-deficient silica sand cultures developed typical manganese deficiency symptoms of interveinal chlorosis and necrosis. Physiological effects including depression of photosynthesis, respiration, growth, and relative chlorophyll contents were studied. The depression of photosynthesis was not always proportional to reduced chlorophyll content. This is taken to indicate the importance of manganese in reactions concerned in photosynthesis in addition to chlorophyll formation. Age of leaves related to position on the plant and actual aging of the plants with time sometimes produced different results when related to photosynthetic rates, which mainly decreased with age of plants. Chlorophyll content in young leaves increased with plant age, except for a consistent decrease after leaf maturity. Respiration rates generally decreased with age. For the most part, the effects of aging on photosynthesis, respiration, and chlorophyll contents were the same for soybeans as for other species reported in the Iitcrature. , 1

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Effect of Age of Leaves Upon the Rate of Photosynthesis in Some Conifers

Cited by 106 publications

References 5 publications

Needle age dependence of photosynthesis along a light gradient within an Abies alba crown

Needle age dependence of photosynthesis along a light gradient within an Abies alba crown

Functional and Structural Changes in Senescing Populus deltoides (Bartr.) Chloroplasts

Physiological Effects of Manganese Deficiency Related to Age in Soybeans (Glycine Max)

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