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Plant Physiology and Biochemistry: PPB

Lingyu Hu, Kun Zhou, Yangtiansu Li, Xiaofeng Chen, Bingbing Liu, Cuiying Li, Xiaoqing Gong, Fengwang Ma
Myo-inositol mediates various physiological processes and stress responses. Here, we investigated its role in Malus hupehensis Rehd. plants when grown hydroponically under saline conditions. Salt-stressed plants showed reduced growth and marked declines in photosynthetic activity and chlorophyll concentrations. However, pretreatment with 50 μM myo-inositol significantly alleviated those inhibitions and enabled plants to maintain their photosynthetic capacity. In addition to changing stomatal behavior, exogenous myo-inositol inhibited ROS accumulation and Na+ uptake...
November 1, 2018: Plant Physiology and Biochemistry: PPB
Lidija Begović, Ivan Abičić, Alojzije Lalić, Hrvoje Lepeduš, Vera Cesar, Dunja Leljak-Levanić
Since lignin greatly affects stem strength, which is an important agronomical trait, understanding the relationship between lodging resistance and lignin synthesis is important in barley breeding and selection processes. The aim of the study was to reveal the connection between physiological aspects of lignin synthesis and genetic background of barley cultivars with different lodging phenotype. Three barley cultivars Astor, Scarlett and Jaran were compared by measuring lignin, cellulose and total soluble phenolics content, phenylalanine ammonia-lyase activity (PAL) and expression of cinnamoyl-CoA reductase (CCR) and cinnamyl-alcohol dehydrogenase (CAD) in three lower internodes at flowering and grain filling stage...
October 31, 2018: Plant Physiology and Biochemistry: PPB
Haibo Wang, Qinglong Dong, Dingyue Duan, Shuang Zhao, Mingjun Li, Steve van Nocker, Fengwang Ma, Ke Mao
Tyrosine aminotransferase (TAT, EC is the first key enzyme that catalyzes the reversible interconversion of tyrosine and 4-hydroxyphenylpyruvate in the tyrosine-derived pathway for syntheses of important secondary metabolites and compounds. Although plant TAT genes have been proposed to be important in response to abiotic stress, there is little information about TAT genes in woody perennial tree species, especially in economic fruit trees. Based on TAT domain searching, sequence homology screening and phylogenetic analysis, we identified four TATs in apple genome...
October 30, 2018: Plant Physiology and Biochemistry: PPB
Gegen Bao, Umair Ashraf, Chunling Wang, Longxin He, Xiaoshan Wei, Axiang Zheng, Zhaowen Mo, Xiangru Tang
Factors affecting rice aroma biosynthesis have been well documented previously, however the molecular mechanism lies behind the regulations in grain 2-acetyl-1-pyrroline (2AP) biosynthesis under alternate wetting and drying (AWD) remained largely unexplored. Present study investigated the effects of three irrigation regimes i.e., conventional irrigation (CI), alternate wetting and moderate drying (WMD), and alternate wetting and severe drying (WSD) on the yield, quality traits, intermediates, enzyme activities and genes involved in 2-acetyl-1-pyrroline biosynthesis in two fragrant rice cultivars viz, Meixiangzhan2 and Xiangyaxiangzhan...
October 29, 2018: Plant Physiology and Biochemistry: PPB
Jozef Kováčik, Sławomir Dresler, Magdalena Wójciak-Kosior, Juraj Hladký, Petr Babula
Manganese (Mn) uptake and toxicity in chamomile (Matricaria chamomilla) and changes of phenolic metabolites in plants grown in the soil (1000 μM Mn2+ ) or hydroponic culture (100 or 1000 μM Mn2+ ) were studied. Under soil cultivation, Mn excess reduced growth and induced symptoms of oxidative stress (including total ROS, hydroxyl radical and lipid peroxidation as detected by fluorescence microscopy), concomitantly with depletion of non-protein thiols and ascorbic acid. Total soluble phenols and individual phenolic acids were rather depleted (p-coumaric, chlorogenic, and protocatechuic acids) or unaltered (vanillic and caffeic acids)...
October 29, 2018: Plant Physiology and Biochemistry: PPB
Yazhen Zhang, Kang Wei, Hailin Li, Liyuan Wang, Li Ruan, Dandan Pang, Hao Cheng
Tea is a non-alcoholic beverage with many benefits to human health and thereby widely consumed in the world. It contains plenty of secondary metabolites and tea catechins are the characteristic compounds. To further elucidate the biosynthetic and regulatory mechanisms of catechins in tea, high performance liquid chromatography (HPLC) and transcriptome analysis were performed in tea seedlings of different growth stages. A combined method of differential expression and correlation analysis was then conducted...
October 29, 2018: Plant Physiology and Biochemistry: PPB
Marie-Claire Héloir, Ian Li Kim Khiook, Christelle Lemaître-Guillier, Gilles Clément, Lucile Jacquens, Eric Bernaud, Sophie Trouvelot, Marielle Adrian
Elicitor-induced resistance against diseases is an attractive strategy that could contribute to reduce the use of fungicides for plant protection. However, activation of defenses has an energetic cost that plants have to fuel by a mobilization of their primary metabolism with possible adverse effect on their physiology. In this context, this study was performed to determine whether elicitor-induced resistance of grapevine leaves against downy mildew impacted its development and metabolism. The elicitor PS3 (sulfated β-glucan laminarin) was sprayed on grapevine herbaceous cuttings grown in greenhouses once or three times, and its impact was studied on young and older grapevine leaves, prior to, and after Plasmopara viticola inoculation...
October 28, 2018: Plant Physiology and Biochemistry: PPB
Janesh Kumar Gautam, Ashis Kumar Nandi
Arabidopsis AP2 FAMILY PROTEIN INVOLVED IN DISEASE DEFENSE (APD1) is a member of AP2/EREBP super-family that positively regulates SA biosynthesis and defense against virulent bacterial pathogens. Here we report additional roles of APD1 in plant defense and development. We show that APD1 function is required for light-mediated defense against bacterial pathogens and systemic acquired resistance (SAR). We demonstrate that APD1 function is not required for generating SAR mobile signal at the site of primary inoculation but is required at the distal end for SAR manifestation...
October 28, 2018: Plant Physiology and Biochemistry: PPB
Grazia Maria Borrelli, Mariagiovanna Fragasso, Franca Nigro, Cristiano Platani, Roberto Papa, Romina Beleggia, Daniela Trono
The key mechanisms of salinity tolerance (ST) in durum wheat were investigated, with five genotypes used to determine changes in morpho-physiological traits and mineral and metabolite contents after exposure to 50, 100 and 200 mM NaCl. Plant growth impairment was evident at the highest salt level. Under this condition, a wide range of shoot Na+ contents and ST were observed within genotypes. However, no significant correlation was seen between ST and Na+ exclusion from the shoots, which indicates that tissue tolerance also has a role...
October 26, 2018: Plant Physiology and Biochemistry: PPB
Mahmood Mohammadi, Seyed Ali Mohammad Modarres-Sanavy, Hemmatolah Pirdashti, Behnam Zand, Zeinolabedin Tahmasebi-Sarvestani
The 2015-2020 dietary guidelines for Americans advise substituting total unsaturated fatty acids (∑UFA) for total saturated fatty acids (∑SFA). Thus, field experiments were carried out to verify the influence of irrigation regime (well-irrigated and water deficit) and fertilizers (chemical and biological) on the ratio of ∑UFA to ∑SFA of evening primrose seed oil. Therefore, two experiments were conducted at the experimental stations (arid and semi-arid) of Iran in 2014 and 2015. Experiments were conducted in a split factorial layout within a randomized complete block design with three replications...
October 25, 2018: Plant Physiology and Biochemistry: PPB
Qinzheng Cao, Xiqing Zhang, Xue Gao, Lianjuan Wang, Guixia Jia
Polyploidy plays an important role in plant breeding, inducing a wide range of effects on photosynthetic performance, cellular and photochemical aspects of photosynthesis. Although the impacts of polyploidization on photosynthesis have been examined in several genera, comparatively little is known about the photosynthetic responses to polyploidy in Lilium. In this study, diploid and colchicine-induced tetraploid Lilium FO hybrids were used to study the effects of polyploidization on cellular, photochemical and photosynthetic characteristics in Lilium...
October 25, 2018: Plant Physiology and Biochemistry: PPB
Cátia Brito, Lia-Tânia Dinis, Helena Ferreira, Luís Rocha, Ivo Pavia, José Moutinho-Pereira, Carlos M Correia
Regarding the foreseeing climate change is reasonable to expect harmful consequences to olive tree (Olea europaea L.), an iconic species of Mediterranean region. Thus, the selection of practices that allow a better drought resistance and recovery capacity needs the immediate attention of scientific community. This study evaluates the strategies adopted by young potted olive trees, subjected to three cycles of drought and rewatering, in the presence of a reflective clay, kaolin (KL). The results demonstrated that KL induced shade-related leaf structural changes and was effective in keeping leaf water status during the most stressful periods...
October 25, 2018: Plant Physiology and Biochemistry: PPB
Yang Gaoshan, Liu Na, Ding Dong, Wang Shuaishuai, Liu Peng, Han Shengfang, Wang Dongmei
In the interaction between wheat and Puccinia triticina, wheat resists the invasion of P. triticina by producing hypersensitive reaction-programmed cell death (HR-PCD). To better understand the mechanism of wheat resistance to P. triticina, it is important to identify the defensive genes involved in wheat resistance to leaf rust. This paper systematically presented the role of Wrab17 in the HR-PCD process in wheat after infection by P. triticina. The subcellular location analysis is performed using the full length of Wrab17 coding sequences and Wrab17 is found to be localized in cell nucleus and cytoplasm...
October 24, 2018: Plant Physiology and Biochemistry: PPB
Ting Shi, Jie Sun, Xinxin Wu, Jinyang Weng, Pengkai Wang, Hongli Qie, Yinghong Huang, Huakun Wang, Zhihong Gao
Chinese bayberry (Myrica rubra Sieb. et Zucc.) is a typical fruit tree grown in the hilly region of Southern China. The fruit is sensitive to storage and transportation conditions and presents a major problem in its commercialization. The present study was conducted to investigate the regulation of gene expression involved in plant hormone signaling pathway in the Chinese bayberry with different treatments of heat and 1-methylcyclopene (1-MCP) during postharvest storage. In one treatment group (HM group), we exposed Chinese bayberry fruit to 48 °C for 10 min and then sealed them in a desiccator with 5 μl·L-1 of 1-MCP for 24 h at 20 °C, followed by storage at 10 °C...
October 24, 2018: Plant Physiology and Biochemistry: PPB
Marcel A K Jansen, Wolfgang Bilger, Éva Hideg, Åke Strid, Otmar Urban
No abstract text is available yet for this article.
October 23, 2018: Plant Physiology and Biochemistry: PPB
G Russo, I Beritognolo, M Sabatti, J M Climent, M Lauteri, P De Angelis
Populus nigra L. represents a model system for plant biology and has a productive interest in breeding for short rotation forestry. The growth potential and adaptive capacity of this species are well characterized, but the canopy effect is poorly investigated. We analyzed morphological and functional leaf traits across a multilayer canopy profile in two contrasting clones of this species, 58-861 and Poli, respectively from northern and southern Italy, grown in field plantation. The results revealed how the variation of leaf functional traits was structured within the canopy...
October 22, 2018: Plant Physiology and Biochemistry: PPB
Yaliang Wang, Yongtao Cui, Guohui Hu, Xiaodan Wang, Huizhe Chen, Qinghua Shi, Jing Xiang, Yikai Zhang, Defeng Zhu, Yuping Zhang
GA is important for rice seed germination, and seed embryo growth relies on sugar supplementation via starch hydrolysis in the endosperm. Low temperature reduces the seed germination rates of rice; however, the mechanism of GA metabolism and its impact on sugar utilization of germinating seeds under low temperature conditions remain poorly understood. In this study, low-temperature (15 °C) treatment delayed rice (Oryza sativa L.) seed germination, promoted GA deactivation, inhibited GA signal transduction, and increased ABA synthesis in the seed compared with normal treatment (30 °C)...
October 19, 2018: Plant Physiology and Biochemistry: PPB
Hongju Zhu, Shengjie Zhao, Xuqiang Lu, Nan He, Lei Gao, Junling Dou, Zhilong Bie, Wenge Liu
Salinity is a major abiotic stress factor that affects crop productivity. Roots play an important role in salt stress in plants. Watermelon is a salt-sensitive crop; however, tetraploid watermelon seedlings are more tolerant to salt stress than their homogenotype diploid ancestors. To obtain insights into the reasons underlying the differences in salt tolerance with respect to the ploidy of plants, self-grafted and cross-grafted diploid and tetraploid watermelon seedlings were exposed to 300 mM NaCl for 8 days...
October 17, 2018: Plant Physiology and Biochemistry: PPB
Klaudia Sychta, Aneta Słomka, Szymon Suski, Elżbieta Fiedor, Ewa Gregoraszczuk, Elżbieta Kuta
We studied the zinc and lead accumulation and tolerance level of suspended cells of four Viola species with different metallophyte statuses: Viola lutea ssp. westfalica (obligate metallophyte), V. tricolor (facultative metallophyte), V. arvensis (accidental metallophyte) and V. uliginosa (nonmetallophyte), in order to determine the correlation between cell and plant tolerance. Cells of all studied species/genotypes were tolerant to metal concentrations applied to the medium for 24, 48 and 72 h, more for zinc than for lead, as estimated by cell viability using the alamarBlue assay...
October 13, 2018: Plant Physiology and Biochemistry: PPB
Matthias Schultze, Wolfgang Bilger
Various environmental variables interact with UV-B radiation (280-315 nm), among them temperature. In many plants epidermal UV screening is induced by low temperature even in the absence of UV irradiation. On the other hand, low temperature can aggravate damage caused by UV-B radiation. We investigated the interaction of UV-B radiation and low temperature in Arabidopsis thaliana (L.) Heynh. Exposure of plants grown at moderate temperature (21 °C) to UV-B radiation at 9 °C resulted in significantly higher damage of photosystem II (PS II) as compared to exposure at 21 °C...
October 13, 2018: Plant Physiology and Biochemistry: PPB
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