Stomatal conductance and gross photosynthesis of potato (Solanum tuberosum L.) as influenced by irradiance, temperature, and growth stage

Dwelle, R. B.; Kleinkopf, G. E.; Pavek, J. J.

doi:10.1007/bf02362016

Cited by 70 publications

(32 citation statements)

References 7 publications

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“…Several studies have demonstrated inhibition of Calvin cycle activity resulting from inactivation of ribulose-1 ,5-bisphosphate carboxylase/oxygenase at high temperature (10,22) that could account for the VPD-insensitive inhibition of CO2 fixation we observe. However, the conclusion that stomatal factors contribute to decreased photosynthesis at elevated temperature is contrary to previous work in potato (6) and other species (1,12,14). If stomatal limitations are present, an obvious consequence of reduced internal CO2 concentration at high temperature would be an increase in the rate of photorespiration, especially as the compensation point of ribulose-1 ,5-bisphosphate carboxylase/oxygenase has been shown to increase with temperature (24).…”

Section: Discussioncontrasting

confidence: 54%

Photosynthesis at High Temperature in Tuber-Bearing Solanum Species

Reynolds¹,

Ewing²,

Owens³

1990

Plant Physiol.

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Differences in the photosynthetic performance between pairs of heat tolerant (HT) and heat sensitive (HS) accessions of tuberbearing Solanum species were measured at 40 OC, after treating plants at 40/30 IC. After 1 to 9 days of heat treatment, both HT and HS accessions showed progressive inhibitory effects, pnmarily decreased rates of CO2 fixation, and loss of leaf chlorophyll. These effects were most pronounced in the HS accessions. Stomatal conductivity and intemal CO2 concentrations were lower for both accessions at 40 OC especially for the HS accessions, suggesting that at ambient CO2 concentrations, stomatal conductance was limiting CO2 availability at the higher temperature. In the HT accessions, stomatal limitations were largely attributed to differences in vapor pressure deficit between 25 0 and 40°C, while the HS accessions exhibited significant nonstomatal limitations. The young expanding leaves of the HS accession showed some HT characteristics, while the oldest leaves showed severe senescence symptoms after 9 days at 40/30 "C. The data suggest that differences in heat sensitivity between HT and HS accessions are the result of accelerated senescence, chlorophyll loss, reduced stomatal conductance, and inhibition of dark reactions at high temperature.It is one of the challenges of crop scientists to find ways of improving plant yield in stressful environments. One important approach to this work is to identify stress-related physiological processes that impair plant performance so that screening procedures can be developed to select better adapted cultivars. It is well established that whole leaf photosynthesis is inhibited at high temperatures in nonacclimated plants (1). However, for most crop species it is not known whether differences in the degree to which photosynthesis is impaired at elevated temperatures are causally related to differences in

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Section: Discussioncontrasting

confidence: 54%

Photosynthesis at High Temperature in Tuber-Bearing Solanum Species

Reynolds¹,

Ewing²,

Owens³

1990

Plant Physiol.

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“…However, stomatal conductances of S. chacoense and S. stoloniferum were lower at 40 °C than those of controls at 25 °C, and they were lower in the heat-sensitive accessions than in the heat-tolerant accessions at 40 °C (Reynolds et al, 1990). Dwelle et al (1981) concluded that the decline in carbon assimilation due to high temperature could not be attributed to changes in stomatal conductance, but the decrease must be due to direct high temperature inhibition of the photosynthetic rate. In this study, the transpiration rate of each genotype under high temperature conditions increased compared to control conditions.…”

Section: Discussionmentioning

confidence: 99%

Assessment of morphophysiological traits for selection of heat-tolerant potato genotypes

Demirel¹,

Çalışkan²,

Yavuz³

et al. 2017

Turk J Agric For

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Since potato production has been expanded into warmer regions, breeding heat-tolerant potato varieties has also been considered among the top priorities in most breeding programs in recent years. Identification of traits related to heat tolerance in potato is crucial for selection of heat-tolerant genotypes. The objective of this study was to evaluate the responses of 17 potato genotypes to high temperature stress for identifying some candidate traits associated with heat tolerance. Haulm dry weight (HDW), leaf area index (LAI), photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), SPAD value, and mean tuber weight (MTW) of potato genotypes at control conditions were significantly and positively correlated with tuber yield of genotypes grown under high temperature conditions, whereas canopy temperature (CT) was negatively associated with tuber yield. Classification of potato genotypes based on heat tolerance was done by principal component analysis with yield-correlated traits. The classification results showed high similarities with the yield performance of genotypes grown under high temperature conditions. The HDW, LAI, Pn, Gs, Tr, CT, and SPAD of potato genotypes grown under normal conditions might be useful traits to screen for heat-tolerant genotypes.

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“…Depending upon the interaction between these controlling parameters, the water status may vary between cultivars. For example cultivar variations in stomatal resistance, transpiration and photosynthesis have all been identified under identical environmental conditions (Dwelle et al, 1981a,b: Coleman, 1986: Vos & Groenwold, 1989.…”

Section: Introductionmentioning

confidence: 98%

Patterns of stem water potential in field grown potatoes using stem psychrometers

Coffey

Dixon

1997

Potato Res

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SummaryThe first large scale outdoor measurements of potato (Solanum tuberosum L.) stem water potential (SWP) using in sittt temperature-corrected stem psychrometers were performed on three cultivars common to Ontario, Canada (Atlantic, Monona and Norchip). Potato plants were examined under three soil water treatments which included rainfed, irrigated and stressed through the use of rain shelters. Cultivar variations in SWP under both irrigated and rainfed conditions were slight (P>0.05), although some significant (P<0.05) differences in mid-d.ay SWP were evident, especially under conditions conducive to high atmospheric water demand. Under these conditions, cv. Atlantic maintained the lowest SWP with cv. Monona highest and cv. Norchip was intermediate. Few differences in pre-dawn SWP were detected between the three cultivars under well watered and rainfed conditions. Under low soil water, significant differences (P<0.05) were observed. The similar trend of Atlantic maintaining the lowest SWP with Monona the highest was consistent.

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Stomatal conductance and gross photosynthesis of potato (Solanum tuberosum L.) as influenced by irradiance, temperature, and growth stage

Cited by 70 publications

References 7 publications

Photosynthesis at High Temperature in Tuber-Bearing Solanum Species

Photosynthesis at High Temperature in Tuber-Bearing Solanum Species

Assessment of morphophysiological traits for selection of heat-tolerant potato genotypes

Patterns of stem water potential in field grown potatoes using stem psychrometers

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