Effect of High Temperature on Photosynthesis in Potatoes

Wolf, Shmuel; Olesinski, A. A.; Rudich, J.; Marani, A.

doi:10.1093/oxfordjournals.aob.a087922

Cited by 59 publications

(49 citation statements)

References 8 publications

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“…Elevated temperatures resulted in taller plants with the strongest increase in plant height observed for heat‐grown plants (Table ). This phenomenon is called shade‐avoidance phenotype and has also been observed in other studies (Lafta & Lorenzen, ; Wolf, Olesinski, Rudich, & Marani, ).…”

Section: Resultssupporting

confidence: 73%

Deciphering source and sink responses of potato plants (Solanum tuberosum L.) to elevated temperatures

Hastilestari

Lorenz

Reid

et al. 2018

Plant Cell & Environment

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Potato is an important staple food with increasing popularity worldwide. Elevated temperatures significantly impair tuber yield and quality. Breeding heat-tolerant cultivars is therefore an urgent need to ensure sustainable potato production in the future. An integrated approach combining physiology, biochemistry, and molecular biology was undertaken to contribute to a better understanding of heat effects on source- (leaves) and sink-organs (tubers) in a heat-susceptible cultivar. An experimental set-up was designed allowing tissue-specific heat application. Elevated day and night (29°C/27°C) temperatures impaired photosynthesis and assimilate production. Biomass allocation shifted away from tubers towards leaves indicating reduced sink strength of developing tubers. Reduced sink strength of tubers was paralleled by decreased sucrose synthase activity and expression under elevated temperatures. Heat-mediated inhibition of tuber growth coincided with a decreased expression of the phloem-mobile tuberization signal SP6A in leaves. SP6A expression and photosynthesis were also affected, when only the belowground space was heated, and leaves were kept under control conditions. By contrast, the negative effects on tuber metabolism were attenuated, when only the shoot was subjected to elevated temperatures. This, together with transcriptional changes discussed, indicated a bidirectional communication between leaves and tubers to adjust the source capacity and/or sink strength to environmental conditions.

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Section: Resultssupporting

confidence: 73%

Deciphering source and sink responses of potato plants (Solanum tuberosum L.) to elevated temperatures

Hastilestari

Lorenz

Reid

et al. 2018

Plant Cell & Environment

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show abstract

“…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). Chl loss, which was significant in S. chacoense after 5 d at 40/30°C (Fig.…”

Section: Discussioncontrasting

confidence: 76%

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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“…in partitioning, in CO2 exchange rates) which could in the absence of feedback controls be tapped to improve growth rates. Feed-back processes, unfortunately, are clearly illustrated by one of the clones included in our study and common to that of Wolf et al (1990). Although it had photosynthetic rates superior to most clones in both studies, NAR and RGR were low, perhaps due to the poor investment in leaf area ( Table 2).…”

Section: Discussionmentioning

confidence: 85%

“…Recent evidence (Wolf et al, 1990;Reynolds et al, 1990) indicates a relatively high adaptive capacity of the photosynthetic system of the potato to high temperatures.…”

Section: Discussionmentioning

confidence: 99%

Sources of heat tolerance amongst potato cultivars, breeding lines, and Solanum species

Midmore

Prange

1991

Euphytica

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This study assessed 46 potato cultivars, breeding lines and Solanum spp. for heat-tolerance using short-term growth rates and carbon assimilation measurements of young in-vitro-derived plants. Plants of the 46 clones and species were transferred from greenhouse conditions to controlled conditions set at 33/25° C day/night with 12 h photosynthetic photon flux density (PPFD) at 430--450/xmol m-2s -1 and an 8 h daylength extension (6/xmol m-2s-1), to inhibit tuberization. Twenty eight accessions were also grown in a 20/10°C controlled environment. Plants were harvested after 10 and 20 days and dry weights of the plant components were measured for plant growth analysis. Gas exchange (leaf net photosynthesis and maintenance dark respiration) and leaf chlorophyll fluorescence parameters (O, P, and T) were measured at 30 ° C. Amongst the 30 accessions grown at both hot and cool temperatures, only two accessions (Yungay and AVRDC 1287.19) produced more dry weight in the hot chamber than the cool chamber. Hot/cool ratios for net assimilation rate (NAR) and relative growth rate (RGR) exceeded unity in five and six accessions, respectively. For the 46 accessions grown under hot conditions, none had significantly greater values than those of the control clones for RGR and NAR. Differences between clones in maintenance respiration and net photosynthesis were more closely related to RGR, NAR, and total dry weight (TDWT) in clones which invested more dry weight in leaves and less in stems. Attributes of the chlorophyll fluorescence curve did not explain more of the clonal variation in RGR, NAR, and TDWT than did gas exchange parameters. No single gas exchange or fluorescence character explained more than 50% of the variability among clones for NAR, RGR, or TDWT, but combination of favourable attributes could improve potato heat tolerance in the future.

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Effect of High Temperature on Photosynthesis in Potatoes

Cited by 59 publications

References 8 publications

Deciphering source and sink responses of potato plants (Solanum tuberosum L.) to elevated temperatures

Deciphering source and sink responses of potato plants (Solanum tuberosum L.) to elevated temperatures

Photosynthesis at High Temperature in Tuber-Bearing Solanum Species

Sources of heat tolerance amongst potato cultivars, breeding lines, and Solanum species

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