High night temperature decreases leaf photosynthesis and pollen function in grain sorghum

Prasad, P. V. Vara; Djanaguiraman, M.

doi:10.1071/fp11035

Cited by 130 publications

(150 citation statements)

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“…In this aspect, an increased MDA content in rice leaves under HNT indicates that the production of ROS is greater than in the control plants (Shah et al, 2011). Similar observations, where HNT affects membrane stability in susceptible genotypes, were also reported in wheat, sorghum and soybean (Prasad et al, 2008, Prasad and Djanaguiraman 2011, Djanaguiraman et al, 2013. On the other hand, Mohammed and Tarpley (2009) reported that susceptible rice genotypes under HNT showed a low total antioxidant capacity, resulting in higher electrolyte leakage.…”

Section: Chlorophyll Fluorescence and Leaf Photosynthetic Pigmentssupporting

confidence: 62%

“…1). The adverse effects of HNT on leaf photosynthesis also has been reported in rice (Mohammed et al, 2013) and sorghum (Prasad and Djanaguiraman, 2011). The decrease in Pn under HNT can be associated with a reduction in stomatal conductance (Mohammed et al, 2013) and alterations in plant carbohydrate content because of the lower hexose and sucrose concentrations in heat-stressed leaves (Loka and Oosterhuis, 2016).…”

Section: Photosynthesis Carboxylation Efficiency and Intrinsic Watermentioning

confidence: 97%

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The Effects of Night-time Temperatures on Physiological and Biochemical Traits in Rice

Alvarado-Sanabria

Garcés-Varón²,

Restrepo-Díaz

2017

Not Bot Horti Agrobo

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High nighttime temperatures impair rice yield. Additionally, heat stress periods have increased during the last years in the rice areas of the tropics. The aim of this study was to physiologically characterize six genotypes of rice (a commercial cultivar (ʻF60ʼ) and five selected lines (ʻIR 1561ʼ, ʻFLO 2764ʼ, ʻLV447-1ʼ, ʻCT19021ʼ, and ʻLV1401ʼ) subjected to two nighttime temperatures (24 and 30 °C), based on different physiological traits. When the collar formed on leaf 6 of the main stem, one group of six plants in each genotype was subjected to 30 °C from 18:00 to 24:00 hours for eight days, while the other group remained at 24 °C. Differences were found in the interaction between genotype and nighttime temperatures, where a high night temperature reduced leaf photosynthesis by approximately 50% in all genotypes compared to the controls (20 µmol vs. 10 µmol CO 2 m -2 s -1 , respectively). In general, higher plant respiration was also observed in almost all genotypes when the plants were exposed to 30 °C. However, rice plants of the genotype ʻF60ʼ showed a constant respiration under two different night temperatures. A high nighttime temperature increased the electrolyte leakage and malondialdehyde content only in the ʻLV1401ʼ plants. Plant growth and F v /F m ratio were separately conditioned by the night temperature or the genotype factor. A lower total plant dry weight was found at 30 °C (620.36 mg) than in rice plants exposed to 24 °C (254.16 mg). The F v /F m ratio was slightly diminished at a high nighttime temperature. These results suggest that physiological variables, such as leaf photosynthesis, plant respiration, malondialdehyde content and leaf photosynthetic pigments, can be considered markers for characterizing tolerant genotypes in earlier growth phases during plant breeding programs.

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Section: Chlorophyll Fluorescence and Leaf Photosynthetic Pigmentssupporting

confidence: 62%

Section: Photosynthesis Carboxylation Efficiency and Intrinsic Watermentioning

confidence: 97%

The Effects of Night-time Temperatures on Physiological and Biochemical Traits in Rice

Alvarado-Sanabria

Garcés-Varón²,

Restrepo-Díaz

2017

Not Bot Horti Agrobo

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“…Light conditions derivative to the exposure to the sun were reported to impact on the number of stamens developed in multi-staminate flowers of heliophilous Adonis vernalis [43]. According to Prasad and Djanaguiraman [64] changes in photosynthesis intensity derivative to light energy changes are responsible for decrease in pollen function, leading in consequence to lower seed-set.…”

Section: Discussionmentioning

confidence: 99%

Does vegetation impact on the population dynamics and male function in Anemone sylvestris L. (Ranunculaceae)? A case study in three natural populations of xerothermic grasslands

Denisow

Wrzesień

2015

Acta Soc Bot Pol

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In Poland, like in other parts of Central Europe, dry grasslands significantly contribute to the biodiversity of both fauna and flora. Anthropogenic pressure impair many species of xerothermic habitats, and several populations face an increased risk of extinction. The goal of the study was to define factors that may affect the size of wild populations of Anemone sylvestris L., a protected species in Poland, with both a short-and long-term perspective, and to examine the influence of vegetation changes on the density, the abundance of flowering and male function (pollen production, pollen viability), as well as seed set. In situ observations were performed in 2005-2006 and 2011-2012 in three populations located on the Lublin Upland, SE Poland. The reduction in population density and A. sylvestris blooming was exacerbated by the expansion of the shrubs, but not by Brachypodium pinnatum. Male characteristics of A. sylvestris, i.e. pollen amount per multi-staminate flowers or pollen viability appeared to decrease under pressure of shrub competition. Populations with limitation of male function had impaired degree of seed set. Various consequences for the functioning of populations within a metapopulation system can be expected due to substantial qualitative and quantitative disorders in pollen traits. It is crucial that successful recovery programs for A. sylvestris primary should aim to conserve and manage the habitat.

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“…In sorghum, a high temperature of 32 °C/28 °C for 10 days led to an increase of ROS content and membrane alterations in pollen (Prasad and Djanaguiraman 2011). This increase was correlated with a decrease of pollen viability and an alteration in pollen phospholipid content.…”

Section: Lipidsmentioning

confidence: 86%

“…Due to the sensitivity of pollen to environmental stresses, which can lead to an alteration of pollen quality and therefore a decrease of yield in many crops, the number of studies on pollen is rapidly expanding (e.g. rice (Saragih et al 2013), sorghum (Prasad and Djanaguiraman 2011) and tomato (Firon et al 2006)). To understand the dynamic processes and key steps leading to the development of a mature and fertile pollen grain, several studies focussed on the analysis of transcripts, proteins and metabolites in pollen (Rutley and Twell 2015, Muschietti et al 1994, Paupière et al 2014.…”

Section: Discussionmentioning

confidence: 99%

Identification of metabolites involved in heat stress response in different tomato genotypes

Paupière¹

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Propositions1. Since tomato pollen is sensitive to temperature variations, results from climate chamber experiments with controlled temperature cannot be extrapolated to pollen thermotolerance in commercial tomato production.(this thesis)2. The pollen isolation protocol is a critical determinant for the success of pollen metabolomics studies.(this thesis)3. The choice of the p-value has an undesirably strong influence on a study's conclusions.4. Nutrition should be considered as the first medicine. MeatlessMonday is an effective policy to reduce global warming.6. The health of science rests on scientist's honesty. If Dutch were not Dutch but French, most of them would not speak EnglishPropositions belonging to the thesis, entitled Contents ___________________________________________________________________________ Chapter 1General introduction 1 Chapter 2The metabolic basis of pollen thermo-tolerance: Perspectives for breeding 13 Chapter 3The effect of isolation methods of tomato pollen on the results of metabolic profiling 39 Chapter 4Untargeted metabolomic analysis of tomato pollen development and heat stress response 63 Chapter 5Screening for pollen tolerance to high temperatures in tomato 83 Chapter 6Metabolites associated with thermo-tolerance of tomato pollen 95 Chapter 7General discussion 133 References Climate changeClimate is unequivocally changing. In 2014, IPCC released the fifth assessment report on climate change and stated that "the atmosphere and ocean have warmed, the amounts of snow and ice have diminished and sea level has risen" (IPCC 2014). The main cause for this global warming is extremely likely to be due to anthropogenic activities that are widely acknowledged by climate specialists (Cook et al. 2013). Heat waves and extreme temperatures are expected to be more frequent and to last longer (Meehl and Tebaldi 2004). This climate change is expected to affect the world of today in many ways, including the extinction of species that cannot escape their environment and a decrease in food productivity. For instance, the well documented heat wave of 2003 in Europe led to a yield loss of 25% and 21% for maize and wheat in France, respectively, with an overall economic loss in the European Union estimated at 13 billion euros (IPCC 2007). The direct effect on the human population is not to be underestimated, especially if one takes into account that the world population is predicted to rise from 7.3 billion up to 11 billion by the middle of the 21 st century, thus alarming the decision-makers (Porter and Semenov 2005). From the reduction of greenhouse gas emission with the Kyoto protocol (Oberthur and Hermann 1999) to the recent COP21 agreement to limit the temperature increase of 2˚C (Iyer et al. 2015), policymakers mull over mitigation options. A synergy of policies and adaptation strategies may enhance the efficacy to respond to climate change and limit the consequences on living organisms and ecosystems. The adaption of crops is nested in the identification of genotypes tolerant to temperature...

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High night temperature decreases leaf photosynthesis and pollen function in grain sorghum

Cited by 130 publications

References 38 publications

The Effects of Night-time Temperatures on Physiological and Biochemical Traits in Rice

The Effects of Night-time Temperatures on Physiological and Biochemical Traits in Rice

Does vegetation impact on the population dynamics and male function in Anemone sylvestris L. (Ranunculaceae)? A case study in three natural populations of xerothermic grasslands

Identification of metabolites involved in heat stress response in different tomato genotypes

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