Moderate warming increases PSII performance, antioxidant scavenging systems and biomass production in Stylosanthes capitata Vogel

Martínez, Carlos A.; Bianconi, Matheus E; Silva, Lais; Approbato, Andressa Uehara; LEMOS, MARIA EMMANOELE DAMARES OLIVEIRA  DE; Santos, Leticia; Curtarelli, Lucas; Rodrigues, A. C.; Mello, Tathyana Rachel Palo; Manchon, Fernanda Tomita

doi:10.1016/j.envexpbot.2014.02.001

Cited by 55 publications

(52 citation statements)

References 49 publications

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“…These findings did not support partially the first hypothesis that water deficit will impair photosynthesis by damaging the PSII structure, and the second hypothesis that warming will enhance photosynthesis and PSII performance. Martinez et al () showed increased PSII performance and leaf chlorophyll content in Stylosanthes capitata (Fabaceae), a C3 tropical forage species exposed to experimental warming of +2°C under well‐watered conditions. Our results suggest that the PSII activity of P. maximum can acclimate to a moderate warming and water stress environment by constructive adjustment linked to the stability of the photosynthetic apparatus related to the greater strength of membrane integrity and increases in electron transport (Sage and Kubien ).…”

Section: Discussionmentioning

confidence: 99%

Warming and water deficit impact leaf photosynthesis and decrease forage quality and digestibility of a C4 tropical grass

Habermann

Oliveira

Contin

et al. 2019

Physiologia Plantarum

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Global warming is predicted to cause more intense extreme events such as heat waves, flooding and severe droughts, producing significant effects on agriculture. In tropics, climate change will severely impact livestock production affecting water availability, forage quality and food for cattle. We investigated the isolated and combined effects of soil water deficit (wS) and + 2°C increase in canopy temperature (eT) on leaf gas exchange, chlorophyll fluorescence, carbohydrate content, forage quality and in vitro dry matter digestibility (IVDMD) of a field‐grown C4 tropical forage grass Panicum maximum Jacq. using a temperature‐free air‐controlled enhancement (T‐FACE) system. The wS and eT treatments showed no effects on photosystem II photochemistry. However, wS under ambient temperature decreased net photosynthesis rate (A), stomatal conductance (gs) and maximum rate of carboxylation of Rubisco (Vcmax), leading to a reduced starch content in leaves. A 16% reduction in leaf dry mass (LDM) and reduction in forage quality by increasing fibers, reducing crude protein (CP) and decreasing the IVDMD was also observed by effect of wS. Warming under adequate soil moisture (eT) significantly increased LDM by 25% but reduced the forage quality, increasing the lignin content and reducing starch, CP and digestibility. The combined wSeT treatment reduced A, gs, Vcmax and the forage quality. When compared to control, the lignin content in leaves increased by 43, 28 and 17% in wS, eT and wSeT, respectively, causing a significant reduction in IVDMD. We concluded that despite physiological mechanisms to acclimate to warming, both warming and water deficit will impair the quality and digestibility of C4 tropical pastures.

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Section: Discussionmentioning

confidence: 99%

Warming and water deficit impact leaf photosynthesis and decrease forage quality and digestibility of a C4 tropical grass

Habermann

Oliveira

Contin

et al. 2019

Physiologia Plantarum

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“…), is expected to have a diverse and intense impact on plants, ecology, and biological systems (Martinez et al. ). In most cases, an increase in temperature below the optimum temperature is beneficial to plants.…”

Section: Introductionmentioning

confidence: 99%

Responses of plant biomass, photosynthesis and lipid peroxidation to warming and precipitation change in two dominant species (Stipa grandis and Leymus chinensis) from North China Grasslands

Song

Wang

2016

Ecology and Evolution

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Influential factors of global change affect plant carbon uptake and biomass simultaneously. Although the effects from warming and precipitation change have been extensive studied separately, the responses of plant biomass, photosynthesis, and lipid peroxidation to the interaction of these factors are still not fully understood. In this study, we examined the physiological responses of two dominant plant species from grasslands of northern China with different functional traits to combinations of five simulated warming patterns and five simulated precipitation patterns in environment‐controlled chambers. Our results showed that the biomass, net CO 2 assimilation rate (P n), maximal efficiency of photosystem II photochemistry (F v/F m), and chlorophyll content (Chl) of Stipa grandis and Leymus chinensis were enhanced by moderate warming and plus precipitation, but they declined drastically with high temperature and drought. High temperature and drought also led to significant malondialdehyde (MDA) accumulation, which had a negative correlation with leaf biomass. The lower level of lipid peroxidation in leaves of S. grandis suggests that this species is better protected from oxidative damage under heat stress, drought stress and their interactive conditions than L. chinensis. Using the subordinate function values method, we found S. grandis to be more sensitive to climate change than L. chinensis and the gross biomass and root biomass of S. grandis and the leaf biomass of L. chinensis were most sensitive to climate change. Furthermore, the P n of both S. grandis and L. chinensis had a significant linear relationship with F v/F m and Chl, indicating that carbon assimilation may be caused by nonstomatal limitations.

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“…Um dos efeitos mais observados em plantas quando sujeitas a elevadas [CO2] é o aumento na biomassa, pela maior assimilação de carbono e eficiência no uso do carbono (CUE) (CARRILLO et al, 2011;IRVING, 2015;MARTINEZ et al, 2014). Neste trabalho, o único aumento na biomassa pelo incremento de CO2 atmosférico foi observado na biomassa de caules, pelo tratamento de elevada [CO2].…”

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Avaliação do ciclo do carbono em ecossistemas de pastagens tropicais em cenário futuro de mudanças climáticas

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Moderate warming increases PSII performance, antioxidant scavenging systems and biomass production in Stylosanthes capitata Vogel

Cited by 55 publications

References 49 publications

Warming and water deficit impact leaf photosynthesis and decrease forage quality and digestibility of a C4 tropical grass

Warming and water deficit impact leaf photosynthesis and decrease forage quality and digestibility of a C4 tropical grass

Responses of plant biomass, photosynthesis and lipid peroxidation to warming and precipitation change in two dominant species (Stipa grandis and Leymus chinensis) from North China Grasslands

Avaliação do ciclo do carbono em ecossistemas de pastagens tropicais em cenário futuro de mudanças climáticas

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