Article
Agronomy
Juan Carlos Suarez, Cristian Gelpud, Jhon Eduar Noriega, Fausto Andres Ortiz-Morea
Summary: The study investigated the physiological characteristics and stress resistance mechanisms of different cocoa genotypes under various light levels, revealing that some genotypes exhibit good adaptation to full sun conditions, resulting in greater carbon utilization efficiency and energy dissipation mechanisms.
Article
Agronomy
Renata Tobiasz-Salach, Barbara Stadnik, Dagmara Migut
Summary: Soil salinity has a significant negative impact on the growth and development of barley plants, mainly by disrupting the process of photosynthesis and other plant gas exchange parameters. High salt concentrations lead to a decrease in potassium content in plants, accompanied by an increase in salinity levels.
Article
Forestry
Kelly M. McDonald, John R. Seiler, Bingxue Wang, Scott M. Salom, Rusty J. Rhea
Summary: The introduction of hemlock woolly adelgid has caused widespread mortality in eastern hemlock forests in the United States, threatening millions of hectares of these forests. The adelgid feeds on needles and reduces leaf-level physiology, leading to tree decline. This study investigated the leaf physiology of hemlocks at three forested sites with varying degrees of infestation. Treatment with imidacloprid, a commonly used control for adelgid, resulted in increased photosynthetic rates and stomatal conductance after one growing season. After two years, imidacloprid treatment also increased bud break and chlorophyll fluorescence. These findings suggest that adelgid-induced tree mortality is primarily due to reduced leaf area caused by decreased bud break, as well as a slight reduction in leaf-level photosynthesis and stomatal conductance.
Article
Agronomy
Fadwa Benyahia, Flavio Bastos Campos, Ahmed Ben Abdelkader, Boris Basile, Massimo Tagliavini, Carlo Andreotti, Damiano Zanotelli
Summary: A study on potted grapevines subjected to drought cycles was conducted to assess their water status by integrating information from different physiological indexes. The transpiration rate of the vines was mainly influenced by environmental factors, but became affected by soil water availability under evident water stress. The results highlight the importance of specific physiological indexes for effective deficit irrigation strategies in viticulture.
Article
Plant Sciences
Maria Lucrecia Puig, Andres Alberto Rodriguez, Alfonso Andres Vidal, Rodolfo Bezus, Santiago Javier Maiale
Summary: This study explored the plant physiological behavior modulating grain protein filling in rice, finding that higher protein varieties have greater photosynthetic capacity and healthier PSII structure, while lower protein varieties exhibit more frequent nitrogen remobilization during grain filling.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2021)
Article
Agricultural Engineering
Marek Bury, Szymon Rusinowski, Krzysztof Sitko, Jacek Krzyzak, Teodor Kitczak, Ewa Mozdzer, Hanna Siwek, Walgorzata Wlodarczyk, Paulina Zieleznik-Rusinowska, Alicja Szada-Borzyszkowska, Marta Pogrzeba
Summary: The study investigated the physiological status of S. hermaphrodita plantations growing on two different marginal lands, one contaminated with heavy metals and one nutrient-poor sandy soil. Higher biomass yield was found on the heavy metal contaminated site, indicating that soil quality was the main factor affecting yield. S. hermaphrodita is a more suitable option for fertile but heavy metal polluted soils, but further research on biomass quality is needed.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Biochemistry & Molecular Biology
Barbara Stadnik, Renata Tobiasz-Salach, Marzena Mazurek
Summary: This study investigated the impact of foliar application of silicon on the photosynthetic apparatus, gas exchange, and DNA methylation of barley under salt stress. The results showed that the exogenous application of silicon increased plant resistance to salt, reduced methylation level, and improved physiological parameters.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Plant Sciences
Fatima Teran, Vicente Vives-Peris, Maria F. Lopez-Climent, Aurelio Gomez-Cadenas, Rosa M. Perez-Clemente
Summary: High temperatures and high light intensity occurring simultaneously under field conditions due to climate change have adverse effects on citrus crops, causing reductions in yield and fruit quality. This study evaluated the impact of these combined stress conditions on Carrizo citrange plants, and found that kaolin mitigated their deleterious effects by reducing leaf damage and abscission, improving physiological parameters, suppressing carotenoid degradation, and modulating hormone levels involved in plant stress responses.
JOURNAL OF PLANT GROWTH REGULATION
(2023)
Article
Biochemistry & Molecular Biology
Renata Tobiasz-Salach, Marzena Mazurek, Beata Jacek
Summary: Soil salinity causes physiological, biochemical and epigenetic changes in plants. The negative effects of salt in soil can be reduced by foliar application of silicon. This study showed that spraying maize plants with silicon had positive effects on chlorophyll content, chlorophyll fluorescence parameters, and plant gas exchange. DNA methylation changes were also observed under salt stress and silicon treatment, suggesting potential mechanisms for plant adaptation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Plant Sciences
Foteini Kolyva, Dimosthenis Nikolopoulos, Panagiota Bresta, Georgios Liakopoulos, George Karabourniotis, Sophia Rhizopoulou
Summary: Grapevine leaves contain CaOx crystals that provide a baseline level of photosynthesis, preventing photoinhibition and oxidative damage. Acclimated grapevine leaves showed changes in structure and function under water deficit conditions, indicating the importance of alarm photosynthesis in providing additional tolerance traits.
Article
Biology
Sonto Silindile Mkhabela, Hussein Shimelis, Abe Shegro Gerrano, Jacob Mashilo
Summary: Physiological and complementary phenotypic traits are important for selecting drought-adapted crop genotypes. This study assessed the drought tolerance of okra accessions based on leaf gas exchange and chlorophyll fluorescence. The results identified drought-tolerant accessions and provided guidance for breeding in water-limited agro-ecologies.
Article
Multidisciplinary Sciences
Xiaoshan Wang, Qiyue Dingxuan, Mengmeng Shi
Summary: The study revealed that Ca2+ can alleviate the inhibition of plant growth and leaf photosynthetic electron transport under NaCl stress, decrease ion accumulation and leakage, and improve photosynthetic efficiency, which could help enhance plant growth in saline alkali lands.
Article
Microbiology
Blancka Yesenia Samaniego-Gamez, Rene Garruna, Jose M. Tun-Suarez, Oscar A. Moreno-Valenzuela, Arturo Reyes-Ramirez, Raul Enrique Valle-Gough, Carlos Enrique Ail-Catzim, Lydia Toscano-Palomar
Summary: The study found that inoculation with Bacillus spp. isolates can improve the photosynthetic efficiency of Capsicum chinense plants infected with PepGMV, reducing disease symptoms. Plants inoculated with Bacillus showed an increase in PSII maximum photochemical quantum yield, CO2 assimilation rate, and water use efficiency compared to uninoculated controls.
Article
Agronomy
Ewa Szpunar-Krok
Summary: The foliar application of biostimulants has a positive effect on the physiological processes in pea plants, especially under favorable weather conditions. The source of biostimulants and drought conditions can have different effects on the treatments.
Article
Plant Sciences
Zijuan Zhou, Peixi Su, Xiukun Wu, Haina Zhang, Rui Shi, Jianping Yang
Summary: The study found that the assimilating stems of Haloxylon ammodendron and Calligonum mongolicum had higher net photosynthetic rates, higher light saturation points, and lower light compensation points compared to leaves. Within each species, the canopy apparent photosynthetic rate was significantly lower than the net photosynthetic rate, and the assimilating stems had a higher daily average canopy apparent photosynthetic rate than leaves. These findings suggest that the assimilating stem is a superior adaptation for desert plants to survive in arid environments.
PHOTOSYNTHESIS RESEARCH
(2022)
Article
Forestry
Brenda Mistral De Oliveira Carvalho Bittencourt, Carolina de Marchi Santiago Da Silva, Sebastiao Zanao Filho, Gustavo Habermann
TREES-STRUCTURE AND FUNCTION
(2020)
Article
Plant Sciences
Brenda Mistral de Oliveira Carvalho Bittencourt, Sebastiao Zanao Filho, Gustavo Habermann
THEORETICAL AND EXPERIMENTAL PLANT PHYSIOLOGY
(2020)
Article
Plant Sciences
Marina Alves Gavassi, Ian Charles Dodd, Jaime Puertolas, Giselle Schwab Silva, Rogerio Falleiros Carvalho, Gustavo Habermann
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2020)
Article
Plant Sciences
Anna C. G. Bressan, Giselle S. Silva, Otavia F. A. A. Banhos, Francisco A. O. Tanaka, Gustavo Habermann
JOURNAL OF PLANT RESEARCH
(2020)
Article
Plant Sciences
Marina Alves Gavassi, Giselle Schwab Silva, Carolina de Marchi Santiago da Silva, Andrew J. Thompson, Kyle Macleod, Paulo Marcelo Rayner Oliveira, Mariana Feitosa Cavalheiro, Douglas Silva Domingues, Gustavo Habermann
Summary: Under aluminum stress, up-regulation of ABA biosynthesis genes in citrus plants leads to decreased leaf hydration and stomatal closure, affecting plant water status and gas exchange.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2021)
Article
Plant Sciences
Anna Carolina Gressler Bressan, Brenda Mistral de Oliveira Carvalho Bittencourt, Giselle Schwab Silva, Gustavo Habermann
Summary: The aluminum-accumulating tree species Vochysia tucanorum from the Brazilian savanna shows healthy growth under aluminum toxicity, but its roots are affected when aluminum is absent in the environment, leading to stunted growth and impaired photosynthesis.
THEORETICAL AND EXPERIMENTAL PLANT PHYSIOLOGY
(2021)
Article
Plant Sciences
Lua Taibo Timpone, Gustavo Habermann
Summary: Aluminum (Al)-accumulating plants are distributed worldwide. In this field study, the researchers measured the Al concentration in different vegetative and reproductive structures of Miconia albicans and found that Al accumulation is not limited to the leaves, but also occurs in senescent leaves and bark.
Article
Forestry
Marina Zaia, Lua Taibo Timpone, Gustavo Habermann
Summary: Al-accumulating species have tolerance to aluminum and can accumulate over 1000 mg Al kg(-1) in their leaves, while non-accumulating species retain low aluminum concentrations in their roots and leaves. Roots are often neglected in studies on accumulating and non-accumulating plants.
TREES-STRUCTURE AND FUNCTION
(2022)
Article
Plant Sciences
Thayssa Rabelo Schley, Danilo Miralha Franco, Joao Pessoa Araujo Junior, Ivan de Godoy Maia, Gustavo Habermann, Luiz Fernando Rolim de Almeida
Summary: Stomatal conductance (g(s)) takes longer to recover after drought compared to leaf water potential or leaf water content (RWC). Aquaporins, specifically SbTIP1;1, could modulate the recovery of g(s) by alleviating its downregulation during rehydration.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2022)
Article
Plant Sciences
Carolina M. S. Silva, Alexander Banguela-Castillo, Douglas S. Domingues, Gustavo Habermann
Summary: In acidic soils, toxic aluminum (Al) inhibits root growth of sensitive species, including Citrus plants. This study identified genes that are modulated by Al in the tolerant 'Mandarin' lime rootstock, highlighting the up-regulation of citrate synthase and citrate exudation by MATE channels. Genes related to specialized metabolism, pectin methylesterification, auxin response, defense to biotic and abiotic stresses, cell division, suberin deposition, and nitrate uptake were also up-regulated by Al, providing targets for future research on Al resistance in this rootstock.
THEORETICAL AND EXPERIMENTAL PLANT PHYSIOLOGY
(2022)
Article
Plant Sciences
Roghieh Hajiboland, Chetan K. Panda, Oksana Lastochkina, Marina A. Gavassi, Gustavo Habermann, Jorge F. Pereira
Summary: This paper reviews the current knowledge of plant responses to toxic aluminum ions (Al3+) in acidic soils. It discusses DNA damage response induced by Al3+, membrane transporters that avoid Al3+ toxicity, Al3+ exclusion mechanisms, the impact of Al3+ on plant nutrition, signaling pathways affected by Al3+ and their influence on gene expression, changes in plant growth regulators caused by Al3+ toxicity, and the beneficial effects of microorganisms on plants under Al3+ stress. Future research directions in these areas are also discussed.
JOURNAL OF PLANT GROWTH REGULATION
(2023)
Article
Agronomy
Brenda Mistral de Oliveira Carvalho, Giselle Schwab Silva, Marina Alves Gavassi, Gustavo Habermann
Summary: The first symptoms of aluminum toxicity are inhibition of root growth, reduced shoot growth, and decreased photosynthetic performance. It is unclear whether aboveground symptoms are a consequence of aluminum retained in the roots or a direct effect of aluminum reaching the mesophyll. This study investigates if aluminum directly impairs photosynthetic performance.
Article
Plant Sciences
G. S. Silva, J. S. Rodrigues, B. M. d. O. Carvalho, M. A. Gavassi, A. C. G. Bressan, G. Habermann
Summary: Aluminium is toxic to most plants, but some species can accumulate it without toxicity symptoms. In this study, an Al-accumulating plant species Qualea grandiflora was grown in nutrient solution with different concentrations of Al. The results showed that Al-treated plants had increased root biomass and leaf hydration, leading to higher carboxylation efficiency. However, there was no direct positive effect of Al on Rubisco activity in the plants.
Article
Forestry
Giselle Schwab Silva, Marina Alves Gavassi, Brenda Mistral de Oliveira Carvalho, Gustavo Habermann
Summary: The first symptom of aluminum (Al) toxicity is the inhibition of root growth, which is associated with low leaf hydration and affects leaf gas exchange in many plants. In this study, we examined whether low leaf hydration occurs before or after root growth inhibition in Citrus x limonia Osbeck. Our results showed that the roots of plants exposed to Al were smaller in size and biomass only at 30 days after treatment. Leaf gas exchange parameters, such as g(s), E-plant, Lp(r), psi md, and leaf water content, were lower in Al-exposed plants compared to control plants. The increased levels of ABA in leaves and roots suggest that ABA is primarily responsible for the low g(s) observed in Al-exposed plants.
Article
Plant Sciences
Mariana F. Cavalheiro, Marina A. Gavassi, Giselle S. Silva, Matheus A. Nogueira, Carolina M. S. Silva, Douglas S. Domingues, Gustavo Habermann
FUNCTIONAL PLANT BIOLOGY
(2020)