Night Temperature has a Minimal Effect on Respiration and Growth in Rapidly Growing Plants

Frantz, Jonathan M.; Cometti, Nilton Nélio; Bugbee, Bruce

doi:10.1093/aob/mch122

Cited by 88 publications

(70 citation statements)

References 56 publications

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“…It is likely that high temperature plus CO 2 enrichment conditions increase the accumulation of stem photoassimilates, as observed in the CG7484RR cultivar (Figure 6). Frantz et al (2004) found an increase of 4.0%/°C in the plant respiration in soybean, along with decrease in leaf and root biomass with reduction in the carbon fraction of the leaves; while stem biomass increased significantly without alteration in carbon fraction.…”

Section: Dry Matter Plant Partitioning and Soybean Yieldmentioning

confidence: 85%

“…The day/night temperatures in T2 and T3 can be explained by the energy partitioning and balance, deriving of the heat accumulation on soil, vegetative tissues respiration, and lower air movement. The condition of higher mean temperatures could increase day/night respiration and the carbon use (Frantz et al, 2004). It has also been shown that soybean grown under high [CO 2 ] experiences leaf respiration increase by a factor of 2.5 when the night average temperature increases between 18 and 26 °C (Bunce, 2005).…”

Section: Meteorological Conditionsmentioning

confidence: 99%

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Response of soybean yield components and allocation of dry matter to increased temperature and CO2 concentration

Pereira-Flores¹,

Justino²,

Ruiz‐Vera³

et al. 2016

Aust J Crop Sci

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Future climatic scenarios can influence crop yield levels and induce hunger if no actions are taken. In this study, we evaluated the effect of increased temperature and CO 2 concentration on soybean yield components and biomass partitioning, that ultimately determine the crops productivity. This is conducted for two soybean genotypes that differ in their canopy and life cycles. Experiments were set as follows: a) T1 -ambient temperature and 390 molCO 2 •mol -1 , b) T2 -ambient air temperature +2.7 o C and ambient CO2, and c) T3 -ambient air temperature + 2.7 o C and 750 molCO 2 •mol -1 . Results indicate that soybean under elevated CO 2 and temperature (T3), were taller and grains weighed more than under the ambient conditions in both cultivars types. However, yield has not increased substantially due to reductions in the ratio of number of branch/plant, pods/branch and grains/branch which lead also to a lesser number of total pods and grains per plant. The increase of temperature favored the number of pods and grains on branches in the modern type cultivar, and on racemes in the old cultivar. This results in more yield in both cultivars versus plants grown in the current ambient, and higher CO 2 concentration plus temperature. In both cultivars, the pods and grains partition were higher on the ontogenically oldest four branches and racemes, with decrease in the other upper ones. In addition, the biomass allocation in vegetative tissues was higher than reproductive biomass, with intensity cultivar dependent. We concluded that in future the yield could be limited by reduction of the numbers of branches and racemes in plant, and by alteration at source-sink relation, thus, indicating that changes in canopy architecture are needed to better take advantage of the increasing concentration of CO 2 .

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Section: Dry Matter Plant Partitioning and Soybean Yieldmentioning

confidence: 85%

Section: Meteorological Conditionsmentioning

confidence: 99%

Response of soybean yield components and allocation of dry matter to increased temperature and CO2 concentration

Pereira-Flores¹,

Justino²,

Ruiz‐Vera³

et al. 2016

Aust J Crop Sci

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show abstract

“…In previous studies examining the effects of night warming on plant growth (Wan et al 2009;Frantz et al 2004;Clark et al 2003;Cheesman and Winter 2013), both negative effects of night warming on tropical tree performance (Clark et al 2003) and positive effects of elevated night temperature on seedlings of two neo-tropical tree species (Cheesman and Winter 2013) have been reported. In the present study, night warming significantly suppressed the growth and development of M. truncatula.…”

Section: Discussionmentioning

confidence: 99%

Arbuscular mycorrhizal symbiosis can mitigate the negative effects of night warming on physiological traits of Medicago truncatula L

Sun

et al. 2014

Mycorrhiza

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Elevated night temperature, one of the main climate warming scenarios, can have profound effects on plant growth and metabolism. However, little attention has been paid to the potential role of mycorrhizal associations in plant responses to night warming, although it is well known that symbiotic fungi can protect host plants against various environmental stresses. In the present study, physiological traits of Medicago truncatula L. in association with the arbuscular mycorrhizal (AM) fungus Rhizophagus irregularis were investigated under simulated night warming. A constant increase in night temperature of 1.53°C significantly reduced plant shoot and root biomass, flower and seed number, leaf sugar concentration, and shoot Zn and root P concentrations. However, the AM association essentially mitigated these negative effects of night warming by improving plant growth, especially through increased root biomass, root to shoot ratio, and shoot Zn and root P concentrations. A significant interaction was observed between R. irregularis inoculation and night warming in influencing both root sucrose concentration and expression of sucrose synthase (SusS) genes, suggesting that AM symbiosis and increased night temperature jointly regulated plant sugar metabolism. Night warming stimulated AM fungal colonization but did not influence arbuscule abundance, symbiosis-related plant or fungal gene expression, or growth of extraradical mycelium, indicating little effect of night warming on the development or functioning of AM symbiosis. These findings highlight the importance of mycorrhizal symbiosis in assisting plant resilience to climate warming.

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“…Growth respiration is typically much less sensitive to warming than maintenance respiration (Frantz et al, 2004), and we therefore do not consider a temperature dependence of this particular respiration term.…”

Section: Temperature Responsementioning

confidence: 99%

Comparing models of microbial–substrate interactions and their response to warming

et al. 2016

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Abstract. Recent developments in modelling soil organic carbon decomposition include the explicit incorporation of enzyme and microbial dynamics. A characteristic of these models is a positive feedback between substrate and consumers, which is absent in traditional first-order decay models. With sufficiently large substrate, this feedback allows an unconstrained growth of microbial biomass. We explore mechanisms that curb unrestricted microbial growth by including finite potential sites where enzymes can bind and by allowing microbial scavenging for enzymes. We further developed a model where enzyme synthesis is not scaled to microbial biomass but associated with a respiratory cost and microbial population adjusts enzyme production in order to optimise their growth. We then tested short-and long-term responses of these models to a step increase in temperature and find that these models differ in the long-term when shortterm responses are harmonised. We show that several mechanisms, including substrate limitation, variable production of microbial enzymes, and microbes feeding on extracellular enzymes eliminate oscillations arising from a positive feedback between microbial biomass and depolymerisation. The model where enzyme production is optimised to yield maximum microbial growth shows the strongest reduction in soil organic carbon in response to warming, and the trajectory of soil carbon largely follows that of a first-order decomposition model. Modifications to separate growth and maintenance respiration generally yield short-term differences, but results converge over time because microbial biomass approaches a quasi-equilibrium with the new conditions of carbon supply and temperature.

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Night Temperature has a Minimal Effect on Respiration and Growth in Rapidly Growing Plants

Cited by 88 publications

References 56 publications

Response of soybean yield components and allocation of dry matter to increased temperature and CO2 concentration

Response of soybean yield components and allocation of dry matter to increased temperature and CO2 concentration

Arbuscular mycorrhizal symbiosis can mitigate the negative effects of night warming on physiological traits of Medicago truncatula L

Comparing models of microbial–substrate interactions and their response to warming

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