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Rafael G Lacalle, María T Gómez-Sagasti, Unai Artetxe, Carlos Garbisu, José M Becerril
Contaminated soils are frequently characterized by the simultaneous presence of organic and inorganic contaminants, as well as a poor biological and nutritional status. Rhizoremediation, the combined use of phytoremediation and bioremediation, has been proposed as a Gentle Remediation Option to rehabilitate multi-contaminated soils. Recently, newer techniques, such as the application of metallic nanoparticles, are being deployed in an attempt to improve traditional remediation options. In order to implement a phytomanagement strategy on calcareous alkaline peri-urban soils simultaneously contaminated with several metals and diesel, we evaluated the effectiveness of Brassica napus L...
November 10, 2017: Science of the Total Environment
M Akhlasur Rahman, Isaac Kofi Bimpong, J B Bizimana, Evangeline D Pascual, Marydee Arceta, B P Mallikarjuna Swamy, Faty Diaw, M Sazzadur Rahman, R K Singh
BACKGROUND: Salinity is one of the most severe and widespread abiotic stresses that affect rice production. The identification of major-effect quantitative trait loci (QTLs) for traits related to salinity tolerance and understanding of QTL × environment interactions (QEIs) can help in more precise and faster development of salinity-tolerant rice varieties through marker-assisted breeding. Recombinant inbred lines (RILs) derived from IR29/Hasawi (a novel source of salinity) were screened for salinity tolerance in the IRRI phytotron in the Philippines (E1) and in two other diverse environments in Senegal (E2) and Tanzania (E3)...
November 2, 2017: Rice
Jiu-Yu Li, Kai-Ying Deng, Dean Hesterberg, Yong-Qiu Xia, Chen-Xi Wu, Ren-Kou Xu
The effect of periphyton propagation in paddy fields on phosphorus biogeochemical cycling has received little attention. In this phytotron study, inorganic phosphorus (Pi ) accumulation by periphyton was investigated for varying inputs of calcium [Ca(II)] or ferrous‑iron [Fe(II)], and lighting conditions. Results indicated that additions of Ca(II) or Fe(II) enhanced abiotic accumulation of Pi by up to 16 times, and decreased solution Pi concentration by up to 50%, especially under light condition. The enhanced Pi accumulation into periphyton intensified with increasing Pi concentration, and Pi accumulation showed a positive linear relationship with Ca or Fe accumulation...
December 31, 2017: Science of the Total Environment
Jørgen Ab Mølmann, Sidsel Fiskaa Hagen, Gunnar B Bengtsson, Tor J Johansen
BACKGROUND: Vegetable growers in Arctic areas must increasingly rely on market strategies based on regional origin and product quality. Swede roots (rutabaga) were grown in a phytotron to investigate the effect of high latitude light conditions on sensory quality and some health and sensory-related compounds. Experimental treatments included modifications of 24 h natural day length (69° 39' N) by moving plants at daily intervals to dark chambers with either no light, fluorescent growth light and/or low intensity photoperiod extension...
February 2018: Journal of the Science of Food and Agriculture
Hongfang Zhu, Xiaofeng Li, Wen Zhai, Yang Liu, Qianqian Gao, Jinping Liu, Li Ren, Huoying Chen, Yuying Zhu
Anthocyanins are secondary metabolites that contribute to red, blue, and purple colors in plants and are affected by light, but the effects of low light on the physiological responses of purple pak-choi plant leaves are still unclear. In this study, purple pak-choi seedlings were exposed to low light by shading with white gauze and black shading in a phytotron. The responses in terms of photosynthetic properties, carbohydrate metabolism, antioxidant enzyme activity, anthocyanin biosynthetic enzyme activity, and the relative chlorophyll and anthocyanin content of leaves were measured...
2017: PloS One
Makoto Hakata, Hiroshi Wada, Chisato Masumoto-Kubo, Ryo Tanaka, Hiroyuki Sato, Satoshi Morita
BACKGROUND: Reduction in rice yield caused by high temperature-induced spikelet sterility has been a serious concern in rice production. To date, several screening methods have been used, although their reproducibility is sometimes poor due to artifacts mainly caused by varietal differences in heading dates and panicle heights (i.e., the distance from the lamps). METHODS: We have developed a novel assay system for heat-induced spikelet sterility by using artificial rice paddies in phytotrons to conduct a highly reproducible assay throughout a year...
2017: Plant Methods
Guixiang Wang, Lin Weng, Meng Li, Han Xiao
Phenotypic plasticity is the phenomenon that one particular genotype produces different phenotypes under different environmental conditions, but its underlying molecular and genetic mechanisms are poorly understood. Plastic traits may be under the control of genes whose expression is modulated by environmental cues. In this study, we investigated phenotypic plasticity in tomato (Solanum lycopersicum) and its ancestral species S. pimpinellifolium by comparing the global gene expression of young seedlings grown under two distinct growth conditions...
March 2, 2017: International Journal of Molecular Sciences
Xiubo Wang, Lifang Wang, Zhouping Shangguan
Water and nitrogen supply are the two primary factors limiting productivity of wheat (Triticum aestivum L.). In our study, two winter wheat varieties, Xinong 979 and large-spike wheat, were evaluated for their physiological responses to different levels of nitrogen and water status during their seedling stage grown in a phytotron. Our results indicated that drought stress greatly reduced the net photosynthetic rate (Pn), transpiration rate (E), and stomatal conductance (Gs), but with a greater increase in instantaneous water use efficiency (WUE)...
2016: PloS One
Chien-Hui Syu, Po-Hsuan Chien, Chia-Chen Huang, Pei-Yu Jiang, Kai-Wei Juang, Dar-Yuan Lee
Limited information is available on the effects of gallium (Ga) and indium (In) on the growth of paddy rice. The Ga and In are emerging contaminants and widely used in high-tech industries nowadays. Understanding the toxicity and accumulation of Ga and In by rice plants is important for reducing the effect on rice production and exposure risk to human by rice consumption. Therefore, this study investigates the effect of Ga and In on the growth of rice seedlings and examines the accumulation and distribution of those elements in plant tissues...
January 2017: Ecotoxicology and Environmental Safety
Lorenzo Rossi, Monica Borghi, Alessandra Francini, Xiuli Lin, De-Yu Xie, Luca Sebastiani
Olive tree (Olea europaea L.) is an important crop in the Mediterranean Basin where drought and salinity are two of the main factors affecting plant productivity. Despite several studies have reported different responses of various olive tree cultivars to salt stress, the mechanisms that convey tolerance and sensitivity remain largely unknown. To investigate this issue, potted olive plants of Leccino (salt-sensitive) and Frantoio (salt-tolerant) cultivars were grown in a phytotron chamber and treated with 0, 60 and 120mM NaCl...
October 1, 2016: Journal of Plant Physiology
Tomasz L Woznicki, Anita Sønsteby, Kjersti Aaby, Berit K Martinsen, Ola M Heide, Anne-Berit Wold, Siv F Remberg
BACKGROUND: Marked effects of the climatic environment on fruit chemical composition have often been demonstrated in field experiments. However, complex covariations of several climatic factors in the natural environment complicate the interpretation of such experiments and the identification of the causal factors. This can be better achieved in a phytotron where the various climatic factors can be varied systematically. Therefore, we grew four black currant cultivars of contrasting origin in a phytotron under controlled post-flowering temperature and photoperiod conditions and analysed the berries for their ascorbic acid, sugar and organic acid contents...
March 2017: Journal of the Science of Food and Agriculture
Edina Türkösi, András Cseh, Éva Darkó, Márta Molnár-Láng
BACKGROUND: Cultivated barley belongs to the tertiary genepool of hexaploid wheat. Genes of interest can be transferred from barley into wheat through wide hybridization. The application of wheat-barley introgression lines could provide an excellent tool for the transfer of earliness, favourable amino acid composition, biotic stress resistance, abiotic stress tolerance, or good tillering ability into wheat. RESULTS: A set of 10 wheat-barley ditelosomic addition lines (2HS, 2HL, 3HS, 3HL, 4HS, 4HL, 6HS, 6HL, 7HS and 7HL) was developed from the progenies of an Asakaze/Manas wheat-barley hybrid produced in Martonvásár, Hungary...
June 21, 2016: BMC Genetics
Xiaocheng Zhu, Dominik Skoneczny, Jeffrey D Weidenhamer, James M Mwendwa, Paul A Weston, Geoff M Gurr, Ragan M Callaway, Leslie A Weston
Bioactive plant secondary products are frequently the drivers of complex rhizosphere interactions, including those with other plants, herbivores and microbiota. These chemically diverse molecules typically accumulate in a highly regulated manner in specialized plant tissues and organelles. We studied the production and localization of bioactive naphthoquinones (NQs) in the roots of Echium plantagineum, an invasive endemic weed in Australia. Roots of E. plantagineum produced red-coloured NQs in the periderm of primary and secondary roots, while seedling root hairs exuded NQs in copious quantities...
June 2016: Journal of Experimental Botany
Neslihan Saruhan Guler, Necla Pehlivan
Hydrogen peroxide (H(2)O(2)) functions as a signal molecule in plants under abiotic and biotic stress. In this study, the role of exogenous H(2)O(2) in improving drought tolerance in two soybean cultivars (Glycine max L. Merrill) differing in their tolerance to drought was evaluated. Plants were grown in plastic pots with normal irrigation in a phytotron. Four weeks after radicle emergence, either 1 mM H(2)O(2) or distilled water was sprayed as foliar onto the leaves of each plant, after drought stress was applied...
June 2016: Acta Biologica Hungarica
Li Li, Jia Li, Qing Gao, Jin-xing Chen
Abstract: The effects of day and night temperature difference (DIF) on tomato's growth were studied in three precisely controlled units in phytotron. Set DIF as 6 °C (25/19 C), 8 °C (26/18 °C), 10 °C (27/17 °C) respectively, with the same diurnal mean temperature as 22 °C. The results showed that, different tomato varieties needed different suitable DIF at different growth stages. Before flouring, compared with DIF 6 °C , DIF 8 °C could significantly improve the growth and development of the wild currant tomato LA1781, increasing the plant height by 23...
September 2015: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Tomasz L Woznicki, Kjersti Aaby, Anita Sønsteby, Ola M Heide, Anne-Berit Wold, Siv F Remberg
The effects of postflowering temperature and daylength on the concentration of individual phenolic compounds were studied in black currant (Ribes nigrum L.) berries under controlled phytotron conditions. The four cultivars studied varied greatly in their concentrations of individual phenolic compounds and temperature stability for accumulation. The concentrations of a wide range of identified phenolic compounds were strongly influenced by temperature over the 12-24 °C range, often with opposite temperature gradient patterns for compounds within the same subclass...
February 3, 2016: Journal of Agricultural and Food Chemistry
Bing Liu, Senthold Asseng, Leilei Liu, Liang Tang, Weixing Cao, Yan Zhu
Higher temperatures caused by future climate change will bring more frequent heat stress events and pose an increasing risk to global wheat production. Crop models have been widely used to simulate future crop productivity but are rarely tested with observed heat stress experimental datasets. Four wheat models (DSSAT-CERES-Wheat, DSSAT-Nwheat, APSIM-Wheat, and WheatGrow) were evaluated with 4 years of environment-controlled phytotron experimental datasets with two wheat cultivars under heat stress at anthesis and grain filling stages...
May 2016: Global Change Biology
Chun-yan Li, Wen Xu, Li-wei Liu, Jing Yang, Xin-kai Zhu, Wen-shan Guo
Low temperature stresses (-3 and -5 °C) were simulated using artificial temperature-controlled phytotrons to study the freezing rate, the contents of endogenous hormones, and the activities of antioxidative enzymes in the leaves of wheat plants of Yangmai 16 (YM 16) and Xumai 30 (XM 30) at jointing stage. The grade and index of freezing injury increased with lower temperature and longer stress. The freezing rate was at the 5th level and the main stems and tillers of both cultivars were finally dead under -5 °C lasting for 72 h...
July 2015: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Yan-hua Zeng, Yu-ping Zhang, Jing Xiang, Ya-liang Wang, Hui-zhe Chen, De-feng Zhu
A pot experiment in phytotron with controlled temperature was conducted to examine the effects of low temperature (LT) on differentiation and retrogression of branches and spikelets and grain filling of rice during panicle initiation (PI). In this study, indica inbred rice called Zhong-jiazaol7 was planted and treated at 17 and 20 °C of LT during primary branches anlage differentiation (II) and pollen mother cell meiosis stage (VI) of PI. The results showed that the numbers of differentiated and survived branches per panicle were significantly reduced under LT treatment compared with control, and the number of survived spikelets was significantly decreased by 7...
July 2015: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Walter Chitarra, Ilenia Siciliano, Ilario Ferrocino, Maria Lodovica Gullino, Angelo Garibaldi
The severity of F. oxysporum f.sp. conglutinans on rocket plants grown under simulated climate change conditions has been studied. The rocket plants were cultivated on an infested substrate (4 log CFU g-1) and a non-infested substrate over three cycles. Pots were placed in six phytotrons in order to simulate different environmental conditions: 1) 400-450 ppm CO2, 18-22°C; 2) 800-850 ppm CO2, 18-22°C; 3) 400-450 ppm CO2, 22-26°C, 4) 800-850 ppm CO2, 22-26°C, 5) 400-450 ppm CO2, 26-30°C; 6) 800-850 ppm CO2, 26-30°C...
2015: PloS One
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