Stomatal Response to Environmental Variables in Two Tropical Forest Species During the Dry Season in Nigeria

Whitehead, David; Okali, D. U. U.; Fasehun, F. E.

doi:10.2307/2402418

Cited by 88 publications

(33 citation statements)

References 22 publications

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“…This suite of responses describes a pattern in which stomata function primarily to regulate water loss, independent of photosynthetic rates. This pattern contrasts sharply with temperate patterns of balanced stomatal responses to multiple environmental factors (6)(7)(8) and with data from seasonal tropical plants indicating strong stomatal responses to light intensity (9).…”

Section: Discussioncontrasting

confidence: 94%

Environmental controls on stomatal conductance in a shrub of the humid tropics

Mooney

Field

Yanes

et al. 1983

Proc. Natl. Acad. Sci. U.S.A.

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Section: Discussioncontrasting

confidence: 94%

Environmental controls on stomatal conductance in a shrub of the humid tropics

Mooney

Field

Yanes

et al. 1983

Proc. Natl. Acad. Sci. U.S.A.

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“…Indicators of competition experienced by the sampled trees, specifically LCR, BHCR, ICI, HDR and CI have significant influence on the b2 and to a lesser extent the b1 parameter for most of the species analyzed (see Table 4 for descriptions of covariates). The influence of these covariates on the b1 and b2 parameters vary from the original pipe model theory [20] which assumed a linear relationship between leaf area and sapwood area, and supports more recent research demonstrating that the leaf area-sapwood area relationship is not necessarily linear [49,50]. The influence of these covariates on the leaf area-sapwood area relationship is most directly interpreted in the models with sapwood area as the primary covariate.…”

Section: Discussionsupporting

confidence: 65%

Leaf Area Prediction Using Three Alternative Sampling Methods for Seven Sierra Nevada Conifer Species

Jones

O’Hara

Gersonde³

2015

Forests

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Prediction of projected tree leaf area using allometric relationships with sapwood cross-sectional area is common in tree-and stand-level production studies. Measuring sapwood is difficult and often requires destructive sampling. This study tested multiple leaf area prediction models across seven diverse conifer species in the Sierra Nevada of California. The best-fit whole tree leaf area prediction model for overall simplicity, accuracy, and utility for all seven species was a nonlinear model with basal area as the primary covariate. A new non-destructive procedure was introduced to extend the branch summation approach to leaf area data collection on trees that cannot be destructively sampled. There were no significant differences between fixed effects assigned to sampling procedures, indicating that data from the tested sampling procedures can be combined for whole tree leaf area modeling purposes. These results indicate that, for the species sampled, accurate leaf area estimates can be obtained through partially-destructive sampling and using common forest inventory data.

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“…Whitehead, Okali & Fasehun 1981;Aphalo & Jarvis 1991; McNaughton & Jarvis 1991). It is commonly observed that greater sensitivity is associated with a higher g s at low D (Kaufmann 1982; McNaughton & Jarvis 1991;Yong, Wong & Farquhar 1997).…”

Section: Introductionmentioning

confidence: 99%

Survey and synthesis of intra‐ and interspecific variation in stomatal sensitivity to vapour pressure deficit

Oren

Sperry

Katul

et al. 1999

Plant Cell & Environment

1,060

122

1,018

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1515Plant, Cell and Environment (1999) 22, 1515-1526 g sm , maximum stomatal conductance for water vapour; J S , sap flux density; k/A L , leaf-specific hydraulic conductance; LAI, leaf area index; DY S-L , water potential difference between soil and leaf. INTRODUCTIONAs the vapour pressure deficit between leaf and air (D) increases, stomata generally respond by partial closure (Lange et al. 1971). In most cases, stomatal conductance (g s ) decreases exponentially with increasing D (Massman & Kaufmann 1991; McCaughey & Iacobelli 1994; Monteith 1995). The stomatal closure response to increasing D generally results in a non-linear increase in transpiration rate (per unit leaf area, E) to a plateau and in some cases a decrease at high D (Jarvis 1980; Monteith 1995;Pataki, Oren & Smith 1999). By avoiding high E that would otherwise be caused by increasing D, stomatal closure avoids the corresponding decline in plant water potential (Saliendra, Sperry & Comstock 1995). It is a reasonable premise that the closure response evolved to prevent excessive dehydration and physiological damage.It is established that the cue for the closure response is linked to E rather than D (Mott & Parkhurst 1991) and is therefore fundamentally a feedback response to water loss from the leaf tissue. The only known mechanism by which the plant can sense E is a change in the water potential (or its proxy, relative water content) of cells in the leaf. However, the identity of these cells, and the details of the signal transduction are unknown. Nevertheless, these results argue for an analysis of stomatal responses to D from the standpoint of the regulation of E (Monteith 1995) and water potential (Saliendra et al. 1995).In this paper, we focus on the sensitivity of the stomatal response to D, where sensitivity refers to the magnitude of the reduction in g s with increasing D. While most plants exhibit a decline in g s with D, there is considerable variation at the intra-and interspecific levels in the sensitivity of the response (e.g. Whitehead, Okali & Fasehun 1981;Aphalo & Jarvis 1991; McNaughton & Jarvis 1991). It is commonly observed that greater sensitivity is associated with a higher g s at low D (Kaufmann 1982; McNaughton & Jarvis 1991;Yong, Wong & Farquhar 1997). Here we test the generality of this relationship for data obtained by both porometric and sap flux methods across a variety of species ABSTRACTResponses of stomatal conductance (g s ) to increasing vapour pressure deficit (D) generally follow an exponential decrease described equally well by several empirical functions. However, the magnitude of the decrease -the stomatal sensitivity -varies considerably both within and between species. Here we analysed data from a variety of sources employing both porometric and sap flux estimates of g s to evaluate the hypothesis that stomatal sensitivity is proportional to the magnitude of g s at low D (£ 1 kPa). To test this relationship we used the function g s = g sref -m · lnD where m is the stomatal sensitivity and g sref = g s a...

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Stomatal Response to Environmental Variables in Two Tropical Forest Species During the Dry Season in Nigeria

Cited by 88 publications

References 22 publications

Environmental controls on stomatal conductance in a shrub of the humid tropics

Environmental controls on stomatal conductance in a shrub of the humid tropics

Leaf Area Prediction Using Three Alternative Sampling Methods for Seven Sierra Nevada Conifer Species

Survey and synthesis of intra‐ and interspecific variation in stomatal sensitivity to vapour pressure deficit

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