1995
DOI: 10.1093/treephys/15.1.57
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Stomatal and mesophyll limitations of photosynthesis in black spruce seedlings during multiple cycles of drought

Abstract: Container-grown black spruce (Picea mariana (Mill.) B.S.P.) seedlings were planted in trays containing a sand and peat mixture, and placed in a climate-controlled greenhouse. One group of seedlings was kept well-watered, and another group was subjected to three cycles of drought. Gas exchange analysis showed that mesophyll photosynthetic function was largely unimpaired by drought. In contrast, stomatal conductance was sensitive to drought, although it became less sensitive with each drought cycle. Both stomata… Show more

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Cited by 50 publications
(27 citation statements)
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“…This would be consistent with the proposal that photorespiration in C 3 plants may be a significant alternative sink for light-induced electron flow [26,29], reducing the possibility of photo inhibitory damage [32,33]. There is also good evidence that both G s and G m are co-regulated and these can limit photosynthesis under water deficits [2,10] for a range of plant species including conifers [7,30]. It is evident from this study and others [30] that G m could limit photosynthesis to a comparable extent as G s in seedlings exposed to water deficits.…”
Section: Discussionsupporting
confidence: 84%
See 1 more Smart Citation
“…This would be consistent with the proposal that photorespiration in C 3 plants may be a significant alternative sink for light-induced electron flow [26,29], reducing the possibility of photo inhibitory damage [32,33]. There is also good evidence that both G s and G m are co-regulated and these can limit photosynthesis under water deficits [2,10] for a range of plant species including conifers [7,30]. It is evident from this study and others [30] that G m could limit photosynthesis to a comparable extent as G s in seedlings exposed to water deficits.…”
Section: Discussionsupporting
confidence: 84%
“…There is also good evidence that both G s and G m are co-regulated and these can limit photosynthesis under water deficits [2,10] for a range of plant species including conifers [7,30]. It is evident from this study and others [30] that G m could limit photosynthesis to a comparable extent as G s in seedlings exposed to water deficits. However, there are difficulties in the assessment of G m , when seedlings are exposed to extended periods of water deficits, due to low C i and/or variable Γ * values [15].…”
Section: Discussionsupporting
confidence: 66%
“…Δ 13 C is reduced during water stress as a consequence of stomatal closure, which restricts CO 2 supply and thus decreases C i (Farquhar et al 1989;Stewart et al 1995). Therefore, changes in the carbon isotope composition of plant organic matter are indicative of drought exposure of a plant or plant community, and have been shown to be negatively correlated with precipitation and air humidity and positively to soil water deficit (Edwards et al 2000;Lipp et al 1996;Treydte et al 2001;Treydte 2003).…”
Section: Introductionmentioning
confidence: 99%
“…Vowinckel et al (1975) (Davies and Zhang, 1991), in such a way as to prevent large fluctuations in the plant water status (Meinzer and Grantz, 1991 (Schulte, 1992). Maximum (Stewart et al, 1994 (Wolff et al, 1977;Grossnickle and Blake, 1986;Blake and Sutton, 1987) (Wolff et al, 1977;Bernier, 1993;Zine El Abidine, 1993 (Tryon and Chapin, 1983). Root growth is usually superficial with long trailing roots progressing at the mineral soil-organic layer interface, or in the surface organic layers in organic soils (Sims et al, 1990).…”
Section: Introductionmentioning
confidence: 99%