2001
DOI: 10.1590/s0103-31312001000300004
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Abstract: -Influence of different light regimes (plants grown in shade and in the sun) on respiration, activity of alternative respiratory pathway and carbohydrates content in mature leaves of Ajuga reptans L. was investigated. All experiments were carried out under natural conditions. Sun plants had higher respiration, activity of the alternative pathway and carbohydrates content compared to the shade plants. Additional experiments were performed in order to study effects of darkening as well as evolution of respiratio… Show more

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Cited by 7 publications
(7 citation statements)
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References 10 publications
(6 reference statements)
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“…Further evidence was derived from a 2‐month experiment with these three species run at contrasting light (27 versus 125 μmol m −2 s −1 ) and NH4 + (0.03 versus 0.21 mg L −1 NH 4 ‐N) environments (Cao et al ., ), showing relatively stable SC contents of the plants even though the growth and FAA contents changed greatly. Similarly, SC contents have been reported to be relatively unresponsive to varying light regimes in terrestrial shade‐tolerant plants as compared with sun plants (Noguchi et al ., ; Pystina & Danilov, ).…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Further evidence was derived from a 2‐month experiment with these three species run at contrasting light (27 versus 125 μmol m −2 s −1 ) and NH4 + (0.03 versus 0.21 mg L −1 NH 4 ‐N) environments (Cao et al ., ), showing relatively stable SC contents of the plants even though the growth and FAA contents changed greatly. Similarly, SC contents have been reported to be relatively unresponsive to varying light regimes in terrestrial shade‐tolerant plants as compared with sun plants (Noguchi et al ., ; Pystina & Danilov, ).…”
Section: Discussionmentioning
confidence: 99%
“…more responsive to NH þ 4 dosing than those from deep waters (M. spicatum, P. pectinatus, C. demersum, P. maackianus and V. natans). It is not clear, however, why the submersed macrophytes adapted to a high light climate (shallow waters) were more prone to accumulate FAA when faced with high NH þ 4 dosing, but it is known that leaves of sun plants exposed to high light need more proteins to support high photosynthesis and have high NH þ 4 turnover in photorespiration (Givnish, 1988;Noguchi et al, 2001;Pystina & Danilov, 2001). Colonising water depths were closely correlated with SC (F-C)/C in leaves but not with FAA (F-C)/C in leaves, possibly because plants experiencing high NH þ 4 dosing lost much more carbohydrate than the amount of carbon skeletons for incorporating NH þ 4 into FAA (Britto et al, 2001;Cao et al, 2004Cao et al, , 2009a, which might have weakened a relationship between colonising water depths and FAA (F-C)/C in comparison with the relationship for the SC (F-C)/C in leaves.…”
mentioning
confidence: 99%
“…However, more accurate studies concluded that stomatal response is less connected to the internal CO 2 concentration of the leaf than anticipated; most of the response to light in stomatal opening is direct, not mediated by CO 2 (Sharkey & Raschke, 1981). Distinct light regimes, both in terms of quantity and composition, influence almost all physiological processes like photosynthesis and respiration rates, affecting also variables like plant height, fresh and dry mass and water content of the plant (Pystina & Danilov, 2001). Water content, on the other hand, shifts both the stem length and leaf area of the plant, in a way to adapt the plant to the amount or quality of light intercepted (Aspiazú et al, 2008).…”
Section: Characteristics Related To the Photosynthesis And Water Use mentioning
confidence: 99%
“…Photosynthetic rate of cassava under competition with C. benghalensis was 7,32 µmol m -2 s -1 CO 2 , while for the average of the remaining treatments was 5,50 µmol m -2 s -1 CO 2 . The radiation balance and composition on the plant when in competition or shading, combined with carbohydrate level in leaves, may increase respiratory rate directly or through alternative pathways associated with the respiratory chain (Pystina & Danilov, 2001). This could make photosynthesis balance even smaller and reduce the ability of the plant to accumulate mass.…”
Section: Cassavamentioning
confidence: 99%
“…Geralmente as mudanças em composição bromatológica são apontadas como positivas devido à maior porcentagem de proteína bruta verificada na forragem produzida em pastos sombreados (LIN et al, 2001;CASTRO et al, 1999). Apesar disso, pouca ou nenhuma diferença é observada nas frações fibrosas e na digestibilidade da forragem (MOREIRA et al, 2009;LIN et al, 2001), além de ser observada menor concentração de carboidratos solúveis nas plantas sombreadas (CASTRO et al, 1999;PAEZ et al, 2007;PYSTINA;DANILOV, 2001 (JORDAN, 2003), razão pela qual pode ser um dos fatores mais positivos da sombra quando se trata de animais com elevado potencial de produção.…”
Section: Introductionunclassified