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Plant Physiology and Biochemistry: PPB

Rangjin Xie, Ting Ge, Jing Zhang, Xiaoting Pan, Yanyan Ma, Shilai Yi, Yongqiang Zheng
Citrus fruits possess two abscission zones (AZ), AZ A and AZ C located at the pedicel and calyx, respectively. Early citrus fruitlet abscission (CFA) exclusively occurs at AZ A. Previous data have shown that indole-3-acetic acid (IAA) could inhibit fruitlet abscission. However, its role in CFA remains vague. In this study, we first removed the ovaries of fruitlets in order to exclude their interferences. Then, the calyxes were treated with IAA, gibberellin 3 (GA3 ) and 6-benzylaminopurine (6-BA), respectively...
July 5, 2018: Plant Physiology and Biochemistry: PPB
Arnon Setsungnern, Chairat Treesubsuntorn, Paitip Thiravetyan
This study was performed to determine the effect of plant-endophytic Enterobacter sp. EN2 interactions and blue-red LED light conditions on gaseous benzene removal by plants. It was found that under consecutive benzene fumigation for three cycles (18 days), inoculation of the strain EN2 into sterilized and non-sterilized native C. comosum resulted in significantly increased gaseous benzene removal compared to that in non-inoculated groups under the same light conditions (P < 0.05). Remarkably, EN2 colonization in inoculated plants under LED conditions was higher than under fluorescence conditions as the EN2 could grow better under LED conditions...
July 4, 2018: Plant Physiology and Biochemistry: PPB
Ravi Gupta, Cheol Woo Min, Qingfeng Meng, Ganesh Kumar Agrawal, Randeep Rakwal, Sun Tae Kim
Abscisic acid (ABA) and ethylene play key roles in growth and development of plants. Several attempts have been made to investigate the ABA and ethylene-induced signaling in plants, however, the involvement of phosphorylation and dephosphorylation in fine-tuning of the induced response has not been investigated much. Here, a phosphoproteomic analysis was carried out to identify the phosphoproteins in response to ABA, ethylene (ET) and combined ABA + ET treatments in soybean leaves. Phosphoproteome analysis led to the identification of 802 phosphopeptides, representing 422 unique protein groups...
July 4, 2018: Plant Physiology and Biochemistry: PPB
Maryam Seifi Kalhor, Sasan Aliniaeifard, Mehdi Seif, Elahe Javadi Asayesh, Françoise Bernard, Batool Hassani, Tao Li
Gamma-Amino Butyric Acid (GABA) is a substantial component of the free amino acid pool with low concentration in plant tissues. Enhanced GABA content occurs during plant growth and developmental processes like seed germination. GABA level, basically, alters in response to many endogenous and exogenous stimuli. In the current study, GABA effects were studied on germination, photosynthetic performance and oxidative damages in salt-exposed lettuce plants. Three NaCl (0, 40 and 80 mM) and two GABA (0 and 25 μM) concentrations were applied on lettuce during two different developmental (seed germination and seedlings growth) stages...
July 3, 2018: Plant Physiology and Biochemistry: PPB
Hadi Falahi, Mohsen Sharifi, Najmeh Ahmadian Chashmi, Hassan Zare Maivan
Plants respond to water stress through a variety of mechanisms, depending on metabolites preferences and their available resources. This work was performed to elucidate the cross-talk between signaling molecules (polyamines (PAs), hydrogen peroxide (H2 O2 ) and nitric oxide (NO)), phenolic compounds and osmolytes (phenylethanoid glycosides (PhGs), phenolic acids, flavonoids, soluble sugars and amino acids) under water stress in Scrophularia striata plants. The results revealed that PAs, NO levels were enhanced in the plants, earlier in response to polyethylene glycol-induced water stress...
July 3, 2018: Plant Physiology and Biochemistry: PPB
Pragya Bhardwaj, Navendu Goswami, Pankhuri Narula, Chakresh Kumar Jain, Ashwani Mathur
Bacopa monnieri (L.) Wettst. is a well documented nootropic plant, extensive known for alleviating symptoms of neurological disorder, along with other symptomatic relief. This property is attributed to the active phytocompounds, saponins (bacoside A) present in the plant. However, lack of stringent validation guidelines in most of the countries bring to the market, formulations differing in phytocompounds yield, thereby suggesting possible variation in therapeutic efficacy. The in-vitro suspension cultures of the Bacopa monnieri, provide an ease of scale-up, but regulating saponin yield is a stringent task...
July 2, 2018: Plant Physiology and Biochemistry: PPB
Qiong Wu, Xiaoya Tao, Xinzi Ai, Zisheng Luo, Linchun Mao, Tiejin Ying, Li Li
Fruit aroma development depends on ripening. Abscisic acid (ABA) has been reported to be involved in the regulation of tomato fruit ripening. In the present study, the effects of exogenous ABA on aromatic volatiles in tomato fruit during postharvest ripening were studied. The results showed that exogenous ABA accelerated color development and ethylene production as well as the accumulation of carotenoids, total phenolics and linoleic acid in tomato fruit during ripening. Moreover, exogenous ABA increased the accumulation of volatile compounds such as 1-peten-3-one (2...
June 30, 2018: Plant Physiology and Biochemistry: PPB
Mathieu Léchaudel, Marie Darnaudery, Thierry Joët, Patrick Fournier, Jacques Joas
Pineapple (Ananas comosus (L.) Merr.) is a non-climacteric tropical fruit whose ripening could be accompanied by oxidative processes and the concurrent activation of enzymatic and non-enzymatic reactive oxygen species (ROS) scavenging systems. To better understand the variability of these processes among climatic environments or genotypes in pineapple, the temporal expression dynamics for genes encoding oxidative and antioxidative stress enzymes were analyzed by real-time RT-PCR during fruit development and ripening, among three cultivars: Queen Victoria, Flhoran 41 and MD-2 hybrid, and in two climatic areas...
June 30, 2018: Plant Physiology and Biochemistry: PPB
Ahmad Mohammad M Mekawy, Maha Nagy Abdelaziz, Akihiro Ueda
Soil salinity is a limiting factor in rice production. Since flavonoids present in most plant tissues play multiple roles in plant-environment interactions, in this study, we focused on the contribution of flavone aglycone (Apigenin) to the adaptation of salinity-sensitive rice cultivar 'Koshihikari,' to salinity stress, for the first time. Rice seeds were soaked in Apigenin solution (10 ppm) for 24 h, then air-dried and grown hydroponically under 50 mM NaCl for 14 days. Apigenin pretreatment improved the growth of rice seedlings by enhancing shoot elongation and dry mass accumulation under both unstressed and NaCl-stress conditions, compared with that in the non-pretreated seedlings...
June 30, 2018: Plant Physiology and Biochemistry: PPB
Jiaqi Li, Xiaoyun Wang, Xinpeng Lin, Guofu Yan, Lun Liu, He Zheng, Bing Zhao, Jie Tang, Yang-Dong Guo
Marine alginate-derived oligosaccharides (ADOs) are prepared from degraded alginate. Our experiments were carried out to determine the mechanism of ADOs to improve resistance to water stress in cucumber (Cucumis sativus L.). We evaluated the effects of ADOs on physiological indices, photosynthesis, reactive oxygen species (ROS) levels, antioxidant enzyme activities, and relative expression levels of drought resistance genes. The growth of drought stressed cucumber decreased markedly. However, treatment with ADOs significantly improved the diameter, fresh weight, photosynthetic rate, transpiration rate, stomatal conductance, maximum quantum yield of photosystem II (Fv/Fm) and chlorophyll degradation; thus, reversing the effects of drought stress...
June 30, 2018: Plant Physiology and Biochemistry: PPB
Dong Cao, Wenjie Chen, Hongxia Wang, Dengcai Liu, Bo Zhang, Baolong Liu, Huaigang Zhang
The abundant genetic diversity in synthetic hexaploid wheat (SHW) can achieve breakthroughs in wheat genetic improvement, but little is known of the genetic mechanisms involved. In this study, three populations of advanced lines (totaling 284 individuals), derived from three top-crosses of SHW-L1 with different common wheat cultivars, followed by ten generations of artificial selection, were used to evaluate the transfer of alien alleles with 24872 Diversity Arrays Technology (DArT) markers. Only 1824, 1786 and 1514 DArT markers were needed to distinguish the alleles from SHW-L1 and the other common wheat parent in the populations SCPD, SS7M and SSYZ, respectively...
June 28, 2018: Plant Physiology and Biochemistry: PPB
Tanja Groher, Simone Schmittgen, Georg Noga, Mauricio Hunsche
Agricultural residues are natural sources for secondary metabolites as high value ingredients for industrial uses. The present work aims to exploit the accumulation potential of rutin and solanesol in tomato leaves following nitrogen and general mineral deficiency in a commercial-like greenhouse. Physiological responses of tomato plants were monitored non-destructively with a multiparametric fluorescence sensor, and biochemical parameters were determined by means of HPLC analysis. Nitrogen and general mineral limitation led to an accumulation of rutin in young tomato leaves while solanesol concentration was higher in mature leaves...
June 27, 2018: Plant Physiology and Biochemistry: PPB
Mohsin Tanveer, Babar Shahzad, Anket Sharma, Sajitha Biju, Renu Bhardwaj
Salt stress is one of most dramatic abiotic stresses, reduces crop yield significantly. Application of hormones proved effective salt stress ameliorating approach. 24-Epibrassinolide (EBL), an active by-product from brassinolide biosynthesis shows significant salt stress tolerance in plants. EBL application improves plant growth and development under salt stress by playing as signalling compound in different metabolic and physiological processes. This article compiles all identified ways by which EBL improves plant growth and enhances crop yield...
June 25, 2018: Plant Physiology and Biochemistry: PPB
Jesús L Romero-Romero, Claudio Inostroza-Blancheteau, Daniela Orellana, Felipe Aquea, Marjorie Reyes-Díaz, Pilar M Gil, Juan Pablo Matte, Patricio Arce-Johnson
Water-use efficiency (WUE) is a quantitative measurement of biomass produced per volume of water transpired by a plant. WUE is an important physiological trait for drought response to mitigate the water deficiency. In this work, a cisgenic construction from Citrus sinensis was developed and its function in the improvement of WUE was evaluated in Arabidopsis. Sequences of the CsMYB61 coding region, a transcription factor implicated in the closure of stomata, together with a putative stomata-specific promoter from CsMYB15, were identified and cloned...
June 25, 2018: Plant Physiology and Biochemistry: PPB
Soni Chowrasia, Alok Kumar Panda, Hukam C Rawal, Harmeet Kaur, Tapan Kumar Mondal
The jumonji (JMJ)-C domain containing proteins belong to histone demethylases family with the ability to demethylate the tri-methylated histone residues. They act as chromatin regulators to regulate many physiological functions in plants. The present study deals with the characterization of JMJ-C gene family members in wild as well as cultivated rice species and their expression analysis in salt tolerant rice genotype, FL478. The genome wide study identified 151 members belonging to JMJ-C gene family in 11 different Oryza species...
June 23, 2018: Plant Physiology and Biochemistry: PPB
Nguyen Hoai Nguyen, Jong-Joo Cheong
AtMYB44 transcripts accumulate non-specifically under diverse stress conditions and with various phytohormone treatments in Arabidopsis thaliana. We investigated the chromatin modifications caused by various signals to uncover the induction mechanism of AtMYB44 transcription. Bisulfite sequencing confirmed a previous database illustrating that the AtMYB44 promoter and gene-body regions are completely DNA methylation-free. Chromatin immunoprecipitation (ChIP) assays revealed that the nucleosome density is remarkably low at the AtMYB44 promoter region...
June 22, 2018: Plant Physiology and Biochemistry: PPB
Ikram Belghith, Jennifer Senkler, Tatjana Hildebrandt, Chedly Abdelly, Hans-Peter Braun, Ahmed Debez
NaCl stress is a major abiotic stress factor limiting the productivity and the geographical distribution of many plant species. Although halophytes are able to withstand and even to require salt in the rhizosphere, roots are the most sensitive organs to salinity. Here, we investigate the variability of salt tolerance in two Tunisian accessions of the halophyte Cakile maritima (Raoued and Djerba, harvested from the semi-arid and arid Mediterranean bioclimatic stages, respectively) with a special emphasis on the proteomic changes in roots...
June 21, 2018: Plant Physiology and Biochemistry: PPB
Gang Ma, Lancui Zhang, Witchulada Yungyuen, Yuki Sato, Takuma Furuya, Masaki Yahata, Kazuki Yamawaki, Masaya Kato
In the present study, carotenoid metabolism was investigated in the fruits of a novel citrus cultivar, 'Seinannohikari' (Citrus spp.). During the maturation, β,β-xanthophylls were accumulated rapidly with β-cryptoxanthin being the dominant carotenoid compound in the flavedo and juice sacs of 'Seinannohikari'. In the juice sacs of mature fruits, 'Seinannohikari' accumulated high amount of carotenoids, especially β-cryptoxanthin. The content of β-cryptoxanthin in the juice sacs of 'Seinannohikari' was approximately 2...
June 21, 2018: Plant Physiology and Biochemistry: PPB
Zhongjian Li, Mingyuan Zhao, Jinfen Jin, Lanyong Zhao, Zongda Xu
The petals of Rosa rugosa are generally pink and purple, never yellow. Although new varieties of R. rugosa have been bred, no yellow variety has ever been obtained. Therefore, the use of roses in garden settings has been restricted. Three R. rugosa hybrid cultivars (R. rugosa 'Miaoyu', 'Rudiepianpian' and 'Jiaomeisanbian') were bred in our laboratory using wild R. rugosa 'Hunchun' as the female parent and Rosa xanthina as the male parent. The petals of these cultivars appear yellow, at least in part; thus, these cultivars represent the first R...
June 20, 2018: Plant Physiology and Biochemistry: PPB
Tania Rodríguez-Calzada, Minjie Qian, Åke Strid, Susanne Neugart, Monika Schreiner, Irineo Torres-Pacheco, Ramon G Guevara-González
It has been suggested that accumulation of flavonoids could be a key step in development of plant tolerance to different environmental stresses. Moreover, it has been recognized that abiotic stresses such as drought and UV-B radiation (280-315 nm) induce phenolic compound accumulation, suggesting a role for these compounds in drought tolerance. The aim of the present study was to evaluate the effect of UV-B exposure on chili pepper (Capsicum annuum, cv. 'Coronel') plant performance, phenolic compound production, and gene expression associated with response to subsequent drought stress...
June 20, 2018: Plant Physiology and Biochemistry: PPB
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