Article
Plant Sciences
Fatemeh Rasouli, Ali Kiani-Pouya, Ayesha Tahir, Lana Shabala, Zhonghua Chen, Sergey Shabala
Summary: Superior salinity tolerance in halophytes is achieved through significantly faster stomatal opening and closure, the ability to discriminate K+ over Na+, and decoupling of CO2 assimilation from changes in stomatal aperture. Stomatal densities are intrinsically lower in halophytic species, and their stomatal responses to environmental stimuli are much faster compared to glycophytes. High maximum carboxylation rate of Rubisco (V-cmax) and higher rates of electron transport through photosystem II (J) contribute to the high photosynthetic rates and biomass productions in halophytic species under moderate salinity levels.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2021)
Article
Environmental Sciences
X. Qian, L. Liu, H. Croft, J. Chen
Summary: This study found a strong relationship between leaf V-cmax,V-25 and chlorophyll content across different plant types, confirming that leaf chlorophyll content can be a reliable proxy for estimating V-cmax,V-25.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Plant Sciences
Hammad A. Khan, Yukiko Nakamura, Robert T. Furbank, John R. Evans
Summary: Changing leaf temperature can affect physiological traits like Rubisco activity, but has a smaller impact on LMA and nitrogen/chlorophyll content. Reflectance spectra also change with leaf temperature, indicating a potential temperature signal.
JOURNAL OF EXPERIMENTAL BOTANY
(2021)
Article
Plant Sciences
Yue Li, Qingtao Wang, Taimiao Fu, Yunfeng Qiao, Lihua Hao, Tao Qi
Summary: The leaf maximum rate of carboxylation (V-cmax) is correlated with leaf nitrogen (N-area) and leaf photosynthetic pigments (Chl(area) and Car(area)). In this study, the relationship between V-cmax and these parameters was evaluated in winter wheat in a farmland ecosystem. The results showed that leaf Chl(area) and leaf Car(area) were more important than leaf N-area for predicting V-cmax. Leaf photosynthetic pigments can be used as a predictor for estimating V-cmax, improving model simulation accuracy.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
Monireh Saeid Nia, Urska Repnik, Karin Krupinska, Wolfgang Bilger
Summary: This study reveals the importance of WHIRLY1 in light acclimation, as deficiency in WHIRLY1 disrupts photosynthesis and leaf morphology. WHIRLY1 plays a systemic role in coordinating responses at the chloroplast and leaf morphology levels.
Article
Plant Sciences
Zineb Choury, Agnieszka Wujeska-Klause, Aimee Bourne, Nikki P. Bown, Mark G. Tjoelker, Belinda E. Medlyn, Kristine Y. Crous
Summary: Research has found differences in the ability of Australian tropical, subtropical, and warm-temperate rainforest trees to adapt to warming. Tropical and subtropical species have higher temperature optima for photosynthesis and have the ability to acclimate to higher temperatures. Despite being grown in higher temperatures, tropical and subtropical species have a similar capacity to acclimate as warm-temperate species.
Article
Chemistry, Multidisciplinary
Xiaobing Tang, Zhaojin Wang, Dan Wu, Zhenghui Wu, Zhenwei Ren, Ruxue Li, Pai Liu, Guanding Mei, Jiayun Sun, Jiahao Yu, Fankai Zheng, Wallace C. H. Choy, Rui Chen, Xiao Wei Sun, Fuqian Yang, Kai Wang
Summary: The development of in situ growth methods for high-quality perovskite single-crystal thin films (SCTFs) is crucial for enhancing the performance of optoelectronic devices. However, the growth mechanism of large-area SCTFs with thin thickness remains elusive. In this study, the influence of three key factors on the in situ growth of high-quality MAPbBr(3) SCTFs on hole-transport layers (HTLs) is investigated, leading to the successful fabrication of SCTFs with outstanding properties and long-term stability.
Article
Environmental Sciences
Xiaoping Wang, Jing M. Chen, Weimin Ju, Yongguang Zhang
Summary: The maximum carboxylation rate (Vcmax) of plant leaves, particularly at 25 degrees C (Vm25 degrees), shows significant seasonal variations and is influenced by various environmental and physiological factors. Air temperature and soil water content are the most important determinants of Vm25 degrees, while leaf chlorophyll content also affects its seasonal variation. These findings are important for better parameterization of Vm25 degrees in ecosystem models.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Geochemistry & Geophysics
Ying Yu, Xiguang Yang, Wenyi Fan
Summary: This study proposes a method that combines hyperspectral data with the Farquhar photosynthetic mechanistic model to estimate the maximum carboxylation rate (V-cmax) of leaves. By calculating the photochemical reflectance index (PRI) and constructing a model for sunlit leaf light-use efficiency (LUE), the sunlit leaf LUE can be estimated. The sunlit leaf LUE and absorbed photosynthetically active radiation (APAR) are then used to estimate the gross primary production (GPP) of the sunlit leaf, and Vcmax is deduced based on the Farquhar mechanistic model. The method can efficiently generate regional Vcmax distribution maps.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Plant Sciences
Ved Parkash, John L. Snider, Henry Y. Sintim, Lavesta C. Hand, Gurpreet Virk, Amrit Pokhrel
Summary: Nitrogen deficiency limits the net carbon assimilation rate in field-grown cotton. The sensitivity of individual physiological processes driving nitrogen deficiency-induced declines in assimilation was examined in this study. The results showed that Rubisco carboxylation, RuBP regeneration, and gross photosynthesis were the most sensitive processes to nitrogen deficiency.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Article
Environmental Sciences
Wanji Zheng, Jun Hu, Jihong Liu, Qian Sun, Zhiwei Li, Jianjun Zhu, Lixin Wu
Summary: Antarctica is one of the most sensitive areas to climate change, and ice velocity is a key parameter for evaluating glacier mass balance. By integrating multibaseline and multiaperture InSAR measurements, complete 3D ice velocities can be derived, effectively eliminating errors induced by DEM and elevation changes, and providing important information on ice thickness variations.
Article
Plant Sciences
Jianzhong Ma, Karl J. Niklas, Leyi Liu, Zhendong Fang, Yirong Li, Peijian Shi
Summary: This study examines the impact of tree size on leaf shape and size, and tests the validity of the Montgomery equation in calculating leaf area for different tree sizes. The results show that tree size significantly affects leaf shape, size, and leaf dry mass per unit area, but the variation in leaf size and shape does not invalidate the Montgomery equation.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Forestry
Kojo Kwakye Ofori-Amanfo, Karel Klem, Barbora Vesela, Petr Holub, Thomas Agyei, Michal V. Marek, John Grace, Otmar Urban
Summary: In reduced summer precipitation conditions, the photosynthetic responses of coniferous spruce and broadleaved oak to changes in atmospheric CO2 concentration differ. While the photosynthetic rate increased in oak saplings under elevated CO2, it either remained unchanged or slightly decreased in Norway spruce. Both species showed an improvement in water use efficiency under elevated CO2.
Article
Plant Sciences
Ramwant Gupta, Ravi Dutt Sharma, Chhedi Lal Verma, Satya Narayan Shashtri
Summary: This study developed a reliable mathematical model for estimating the leaf area of noni based on non-destructive measurements of midrib length and maximum leaf width. The results showed that the estimated leaf area based on maximum width was superior to the estimated leaf area with the help of midrib length. This non-destructive mathematical model is low in cost, accurate and fast, and is important for understanding light interception and nutrient management for healthy plant growth and development.
ACTA PHYSIOLOGIAE PLANTARUM
(2023)
Article
Environmental Sciences
Wen He, Yanqiong Li, Jinye Wang, Yuefeng Yao, Ling Yu, Daxing Gu, Longkang Ni
Summary: The study successfully estimated the leaf N/P ratio of plants in karst areas using five models and fractional differentiation technique. Results indicated that plant growth was primarily limited by phosphorus, with the PLSR+GRNN model showing the best predictive capability and robustness.
Article
Plant Sciences
M. F. Oliveira, R. A. Marenco
Article
Plant Sciences
Paula Romenya dos Santos Gouvea, Ricardo Antonio Marenco
THEORETICAL AND EXPERIMENTAL PLANT PHYSIOLOGY
(2018)
Article
Forestry
Marcilia Freitas de Oliveira, Ricardo Antonio Marenco
IFOREST-BIOGEOSCIENCES AND FORESTRY
(2019)
Article
Forestry
Saul A. Antezana-Vera, Ricardo A. Marenco
Summary: The study found that Minquartia guianensis Aubl. may have increased transpiration rates during the dry season, with tree radial growth positively correlated with monthly precipitation. Daytime sap flow rates were more closely related to irradiance and temperature, while nighttime sap flow was more associated with relative humidity and vapor pressure deficit.
JOURNAL OF FORESTRY RESEARCH
(2021)
Article
Forestry
Keila R. Mendes, Suany Campos, Pedro R. Mutti, Rosaria R. Ferreira, Tarsila M. Ramos, Thiago V. Marques, Jean S. dos Reis, Mariana M. de Lima Vieira, Any Caroline N. Silva, Ana Maria S. Marques, Duany T. C. da Silva, Daniel F. da Silva, Cristiano P. Oliveira, Weber A. Goncalves, Gabriel B. Costa, Marcelo F. Pompelli, Ricardo A. Marenco, Antonio C. D. Antonino, Romulo S. C. Menezes, Bergson G. Bezerra, M. Santos e Silva Claudio
Summary: Seasonally dry tropical forests are valuable for understanding global carbon fluxes, yet there remains a lack of observations in these ecosystems. This study calibrated and evaluated the SITE model in characterizing energy and carbon fluxes in a preserved fragment of the Caatinga biome, finding that the model showed reasonable applicability and accuracy in simulating CO2 fluxes and ecosystem productivity. The findings suggest that changes in dry forest dynamics should be considered in ecosystem carbon balance modeling.
Article
Biology
Ricardo Antonio Marenco, Saul Alfredo Antezana-Vera
Summary: The study aimed to determine the collinearity-free effect of climatic variability on tree growth in the central Amazon. Results showed that tree growth increased with increasing rainfall and relative humidity, but decreased with rising maximum VPD, irradiance, and maximum temperature. Micrometeorological variability did not affect tree growth when MLR was applied.
REVISTA DE BIOLOGIA TROPICAL
(2021)
Article
Forestry
Saul Alfredo Antezana-Vera, Ricardo Antonio Marenco
Summary: The study investigated how tree growth in central Amazon responds to monthly variations of micrometeorological variables. It found that tree growth across species is responsive to changes in most micrometeorological variables, with increases in precipitation, relative humidity, and soil water content promoting growth, while increases in photosynthetically active radiation, maximum temperature, and reference evapotranspiration inhibiting growth. Additionally, it was shown that increases in vapor pressure deficit have a negative effect on tree growth.
IFOREST-BIOGEOSCIENCES AND FORESTRY
(2021)
Article
Agronomy
Daniela Pereira Dias, Ricardo Antonio Marenco
Summary: This study examined the variation in wood and bark water content in Amazonian trees and assessed the impact of microclimatic variability on monthly diameter growth rates. The research found a negative correlation between wood density and WWC, but no significant relationship between stem diameter and water content. Surprisingly, DGR showed no response to microclimate changes, even in an above-average rainy year, indicating that other parts of the tree may have greater priority for carbon allocation during the dry season.
Article
Forestry
M. A. B. Camargo, R. A. Marenco
Summary: This study aimed to determine the collinearity-free effect of microclimatic variability on stem growth of two tree species in the central Amazon. The results showed that fast-growing species responded differently to microclimatic variability compared to slow-growing species. The findings highlight the importance of considering microclimatic variability in understanding the effects of rainfall seasonality on tree growth.
JOURNAL OF TROPICAL FOREST SCIENCE
(2022)
Article
Plant Sciences
Daniela Pereira Dias, Saul Alfredo Antezana-Vera, Ricardo Antonio Marenco
Summary: This study examined the variation of wood and bark water content as well as stem growth in response to microclimatic variability in three Amazonian species. The results showed that wood water content did not vary between seasons, but bark water content increased during the wet season, especially in one of the species. Furthermore, although stem growth varied intra-annually, none of the climatic variables investigated had a significant effect on stem growth.
Article
Agronomy
Alan Pena de Souza, Ricardo Antonio Marenco
Summary: This study examines the individual effect of microclimatic parameters on stem growth of multipurpose forest tree species in the central Amazon. The results show that stem growth increases with rainfall and soil water content, but decreases with increase in maximum temperature and maximum vapor pressure deficit. The findings suggest that vapor pressure deficit may affect stem growth when accounting for the intercorrelation between microclimatic parameters.
Article
Forestry
Saul Alfredo Antezana-Vera, Ricardo Antonio Marenco
Summary: The study suggests that tree transpiration in the central Amazon region may decrease during the dry season, associated with an increase in temperature, PAR, and vapor pressure deficit. A novel finding of the study is that after adjusting for the effects of temperature and PAR, the impact of vapor pressure deficit on sap velocity can become negative.
Article
Forestry
Jamile dos Santos, Ricardo Antonio Marenco, Wendy Carniello Ferreira, Daniela Pereira Dias
Summary: This study evaluated the leaflet morphophysiological characteristics and plasticity index of three woody species in a gallery forest, finding that canopy leaves had significantly higher values of petiole length and diameter, leaflet thickness, while relative water content remained constant. The plasticity index varied significantly within and between species, with petiole length and diameter showing the highest plasticity index values across species.
Article
Forestry
Keila Rego Mendes, Marcos Bento, Ricardo Antonio Marenco
Article
Plant Sciences
Keila Rego Mendes, Ricardo Antonio Marenco, Helena Cristina Santos Nascimento