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Physiologia Plantarum

Chunling Chang, Lei Tian, Lina Ma, Weiqiang Li, Fahad Nasir, Xiujun Li, Lam-Son Phan Tran, Chunjie Tian
Cultivated soybean (Glycine max) was derived from the wild soybean (Glycine soja), which has genetic resources that can be critically important for improving plant stress resistance. However, little information is available pertaining to the molecular and physiochemical comparison between the cultivated and wild soybeans in response to the pathogenic Fusarium oxysporum Schltdl.. In this study, we first used comparative phenotypic and paraffin section analyses to indicate that wild soybean is indeed more resistant to F...
November 14, 2018: Physiologia Plantarum
Feng Wang, Jingwen Gao, Songmei Shi, Xinhua He, Tingbo Dai
No single mechanism can provide an adequate explanation for the inhibition of photosynthesis when plants are supplied with ammonium (NH4 + ) as the sole nitrogen (N) source. We performed a hydroponic experiment using two N sources [5 mM NH4 + and 5 mM nitrate (NO3 - )] to investigate the effects of NH4 + stress on the photosynthetic capacities of two wheat cultivars (NH4 + -sensitive AK58 and NH4 + -tolerant XM25). NH4 + significantly inhibited the growth and light-saturated photosynthesis (Asat ) of both cultivars, but the extent of such inhibition was greater in the NH4 + -sensitive AK58...
November 14, 2018: Physiologia Plantarum
Yuqi Zhang, Elias Kaiser, Yating Zhang, Qichang Yang, Tao Li
Plants are often subjected to rapidly alternating light intensity and quality. While both short- and long-term changes in red and blue light affect leaf photosynthesis, their impact on dynamic photosynthesis is not well documented. It was tested how dynamic and steady-state photosynthetic traits were affected by red/blue ratios, either during growth or during measurements, in tomato leaves. Four red/blue ratios were used: monochromatic red (R100 ), monochromatic blue (B100 ), a red/blue light ratio of 9:1 (R90 B10 ) and a red/blue light ratio of 7:3 (R70 B30 )...
November 13, 2018: Physiologia Plantarum
Zhenzhen Wei, Xinjie Shi, Fang Wei, Zhuxuan Fan, Liqing Mei, Baoming Tian, Yinghui Shi, Gangqiang Cao, Gongyao Shi
The SPORULATION 11 (SPO11) proteins are among eukaryotic the topoisomerase VIA (Topo VIA) homologues involved in modulating various important biological processes, such as growth, development and stress response via endoreduplication in plants, but the underlying mechanism response to stress remains largely unknown under salt treatment. Here, we attempted to characterize a homolog of TOP VIA in upland cotton (Gossypium hirsutum L.), designated as GhSPO11-3. The silencing of GhSPO11-3 in cotton plants resulted in a dwarf phenotype with a failure of cell endoreduplication and a phase shift in the ploidy levels...
November 13, 2018: Physiologia Plantarum
Marcel Pascal Beier, Takayuki Fujita, Kazuhiro Sasaki, Keiichi Kanno, Miwa Ohashi, Wataru Tamura, Noriyuki Konishi, Masahide Saito, Fumi Imagawa, Keiki Ishiyama, Akio Miyao, Tomoyuki Yamaya, Soichi Kojima
Nitrogen is one of the most important elements for plant growth, and urea is one of the most frequently used nitrogen fertilizers worldwide. Besides the exogenously supplied urea from the soil, urea is endogenously synthesized during secondary nitrogen metabolism. Here, we investigated the contribution of a urea transporter, DUR3, to rice production using a reverse genetic approach combined with localization studies. Tos17 insertion lines for DUR3 showed a 50% yield reduction in hydroponic culture, and a 26...
November 13, 2018: Physiologia Plantarum
Katrine Heinsvig Kjaer, Jacob Winde, Karen Koefoed Petersen, Christian Clement Yde, Majken Pagter
As a consequence of global climate change, cold acclimation and deacclimation cycles are becoming increasingly frequent during winter in temperate regions. However, little is known about plant deacclimation and in particular reacclimation mechanisms, although deacclimation resistance and the ability to reacclimate may have wide-ranging consequences regarding plant productivity in a changing climate. Here we report time-dependent responses of freezing tolerance, respiration rates, metabolite contents (HR-MAS NMR) and fatty acid levels (gas chromatography) in flower buds of two ecodormant Ribes nigrum cultivars exposed to three different deacclimation temperatures followed by a reacclimation treatment at 4°C...
November 12, 2018: Physiologia Plantarum
Shashank Sagar Saini, Deepa Teotia, Mariam Gaid, Debabrata Sircar
Cell cultures of Asian pear (Pyrus pyrifolia) are known to produce benzoate-derived biphenyl phytoalexins upon elicitor treatment. Although the downstream pathway for biphenyl phytoalexin biosynthesis is almost known, the upstream route of benzoic acid biosynthetic in pear has not been completely elucidated. In the present work, we report benzaldehyde synthase (BS) activity from yeastextract-treated cell suspension cultures of P. pyrifolia. BS catalyzes the in vitro conversion of trans-cinnamic acid to benzaldehyde using a non-oxidative C2 -side chain cleavage mechanism...
November 11, 2018: Physiologia Plantarum
Albert Premkumar, Sylvia Lindberg, Ida Lager, Ulla Rasmussen, Alexander Schulz
Hypoxia (oxygen deprivation) causes metabolic disturbances at physiological, biochemical and genetic levels and results in decreased plant growth and development. PHOSPHOLIPASE D (PLD)-mediated signalling was reported for abiotic and biotic stress signalling events in plants. To investigate the participatory role of PLDs also in hypoxia signalling, we used wild type of Arabidopsis thaliana and 10 pld isoform mutants containing C2-domain. Hypoxia-induced changes in three major signalling players, namely cytosolic free calcium (Ca2+ cyt ), reactive oxygen species (ROS) and phosphatidic acid (PA), were determined in mesophyll protoplasts...
November 11, 2018: Physiologia Plantarum
Xiaoai Fang, Yue Zhang, Meng Wang, Peng Li, Qing Zhang, Jingjing Si, Bofei Wei, Yan Miao, Lanting Tian, Xia Cai
At present, the lysosome pathway (LP) and proteasome pathway (PP) are known as major clearance systems in eukaryotic cells. The laticifer, a secretory tissue, degrades some cytoplasm during development. In this study, we investigated the distribution of LP and PP in non-articulated laticifers of Euphorbia helioscopia L. Electron microscopy revealed that, plastids, mitochondria and some cyotsol were degraded in the late development laticifers, where there were numerous vesicles originated from dicytosomes. Accordingly, some key proteins in LP and PP were detected in E...
November 9, 2018: Physiologia Plantarum
Akash Tariq, Kaiwen Pan, Olusanya Abiodun Olatunji, Corina Graciano, Zilong Li, Ningning Li, Dagang Song, Feng Sun, Xiaogang Wu, Mohammed A Dakhil, Xiaoming Sun, Lin Zhang
Eucalyptus grandis is the most widely planted tree species worldwide and can face severe drought during the initial months after planting because the root system is developing. A complete randomized design was used to study the effects of two water regimes (well-watered and water-stressed) and phosphorus (P) applications (with and without P) on the morphological and physio-biochemical responses of E. grandis. Drought had negative effects on the growth and metabolism of E. grandis, as indicated by changes in morphological traits, decreased net photosynthetic rates (Pn ), pigment concentrations, leaf relative water contents (LRWCs), nitrogenous compounds, over-production of reactive oxygen species (ROS), and higher lipid peroxidation...
November 9, 2018: Physiologia Plantarum
Sung Don Lim, Su-Hwa Kim, Simon Gilroy, John C Cushman, Won-Gyu Choi
While the accumulation of reactive oxygen species (ROS) through spontaneous generation or as the by-products of aerobic metabolism can be toxic to plants, recent findings demonstrate that ROS act as signaling molecules that play a critical role in adapting to various stress conditions. Tight regulation of ROS homeostasis is required to adapt to stress and survive, yet in vivo spatiotemporal information of ROS dynamics are still largely undefined. In order to understand the dynamics of ROS changes and their biological function in adapting to stresses, two quantitative ROS transcription-based bioreporters were developed...
November 9, 2018: Physiologia Plantarum
Javier Buezo, Álvaro Sanz-Saez, Jose Fernando Moran, David Soba, Iker Aranjuelo, Raquel Esteban
Soybean is a crop of agronomic importance that requires adequate watering during its growth to achieve high production. In this study, we determined physiological, photochemical and metabolic differences in five soybean varieties selected from the parental lines of a Nested Association Mapping (NAM) population during mild drought. These varieties have been described as high-yielding (NE3001, HY1; LD01-5907, HY2) or drought tolerant (PI518751; HYD1; PI398881, HYD2). Nevertheless, there has been little research on the physiological traits that sustain their high productivity under water-limited conditions...
October 31, 2018: Physiologia Plantarum
Vanessa Galli, Rafael S Messias, Frank Guzman, Ellen C Perin, Rogério Margis, Cesar V Rombaldi
Strawberry (Fragaria ananassa Duch.) is an economically important fruit with a high demand owing to its good taste and medicinal properties. However, its cultivation is affected by various biotic and abiotic stresses. Plants exhibit several intrinsic mechanisms to deal with stresses. In the case of strawberry, the mechanisms highlighting the response against these stresses remain to be elucidated, which has hampered the efforts to develop and cultivate strawberry plants with high yield and quality. Although a virtual reference genome of F...
October 27, 2018: Physiologia Plantarum
Miglė Vaičiukynė, Jonas Žiauka, Rasa Žūkienė, Lidija Vertelkaitė, Sigutė Kuusienė
The research aim was to assess the effects of the plant hormone abscisic acid (ABA) and the growth regulator paclobutrazol (PBZ) on root system development during the in vitro culture of different birch and aspen genotypes. The studied genotypes involved two aspen (Populus tremula and Populus tremuloides × P. tremula) and two silver birch (Betula pendula) trees, with one of the birches characterized by its inability to root in vitro. For experiments, apical shoot segments were cultured on nutrient medium enriched with either ABA or PBZ...
October 27, 2018: Physiologia Plantarum
Wasim Ibrahim, Ya-Ming Zhu, Yu Chen, Cheng-Wei Qiu, Zhu Shuijin, Feibo Wu
Drought and salinity stress highly affect the plant growth and production around the world. Secondary metabolites play a main role in adaptation to the environment and in overcoming stress conditions. In order to investigate the effect of drought and salinity, alone or in combination, on secondary metabolism-related enzyme activities, plant hormones and yield parameters, a greenhouse pot experiment was conducted using two cotton genotypes Zhongmian 23 (salt tolerant) and Zhongmian 41 (salt sensitive). Results showed that single and combined drought and salinity stresses caused remarkable decrease in plant height, bolls and lint yield in the order as follows: D+S > salinity > drought, and Zhongmian 41 > Zhongmian 23...
October 27, 2018: Physiologia Plantarum
Guanghai Zhang, Zichao Mao, Qiong Wang, Jie Song, Xuheng Nie, Tingting Wang, Han Zhang, Huachun Guo
Tomato/potato heterografting-triggered phenotypic variations are well documented, yet the molecular mechanisms underlying grafting-induced phenotypic processes remain unknown. To investigate the phenotypic and transcriptomic responses of grafting parents in heterografting in comparison with self-grafting, tomato (Sl) was grafted onto potato rootstocks (St), and comparative phenotyping and transcriptome profiling were performed. Phenotypic analysis showed that Sl/St heterografting induced few phenotypic changes in the tomato scion...
October 25, 2018: Physiologia Plantarum
Luísa C Carvalho, Sara Amâncio
In Mediterranean climate areas, the available scenarios for climate change suggest an increase in the frequency of heat waves and severe drought in summer. Grapevine (Vitis vinifera L.) is a traditional Mediterranean species and is the most valuable fruit crop in the world. Currently, viticulture must adjust to impending climate changes that are already pushing vine-growers towards the use of irrigation, with the concomitant losses in wine quality, and researchers to study tolerance to stress in existing genotypes...
October 25, 2018: Physiologia Plantarum
Xueying Zhang, Xiaolan Jiang, Yuqing He, Linying Li, Ping Xu, Zongtao Sun, Junmin Li, Jiming Xu, Tao Xia, Gaojie Hong
Tea (Camellia sinensis) is an important cash crop that is beneficial to human health due to its remarkable content of catechins. The biosynthesis of catechins follows the flavonoid pathway, which is highly branched. Among the enzymes involved in catechin biosynthesis, anthocyanidin synthase (CsANS) functions at a branch point and play a critical role. Our previous work has demonstrated that the gene encoding CsANS is regulated by light signals, however, the molecular mechanism behind remains unclear. Here, we cloned a full-length CsANS promoter and found that it contained a cis-element recognized by Arabidopsis...
October 24, 2018: Physiologia Plantarum
Peng Chen, Fan Wei, Ru Li, Zeng-Qiang Li, Muhammad Haneef Kashif, Rui-Yang Zhou
Cytoplasmic male sterility (CMS) is widely used in plant breeding and represents a perfect model to understand cyto-nuclear interactions and pollen development research. Lysine acetylation in proteins is a dynamic and reversible post-translational modification (PTM) that plays an important roles in diverse cell processes and signaling. However, studies addressing acetylation PTM regarding to anther and pollen development during CMS background are largely lacking. To reveal the possible mechanism of kenaf(Hibiscus cannabinus L...
October 24, 2018: Physiologia Plantarum
Monica Barman, Adinpunya Mitra
Jasminum spp. is cultivated for their fragrant flowers used in essential oil production and cosmetic uses. An attempt was made to study the temporal variations in floral scent volatiles composition including emitted, free endogenous and glycosyl-linked volatile compounds from two summer-blooming species namely, Jasminum auriculatum and Jasminum grandiflorum, the two winter-blooming species namely, Jasminum multiflorum and Jasminum malabaricum. The overall emitted volatile organic compounds (VOCs) were found to be highest when the matrix Porapak Q 80/100 was used with dichloromethane (DCM) as elution solvent...
October 15, 2018: Physiologia Plantarum
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