Physiological responses and comparative transcriptional profiling of maize roots and leaves under imposition and removal of aluminium toxicity

Li, Youzhi; Lu, Hai-Feng; Fan, Xian‐Wei; Sun, Chengbo; Qing, Dongjin; Dong, Hai-Tao; Wang, Liang

doi:10.1016/j.envexpbot.2010.03.009

Cited by 14 publications

(9 citation statements)

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“…We used root length as an index of growth, because root length is an important agronomic trait and is easily affected by environmental stresses [36], [37]. The inhibition of root growth was more obvious as the treatment concentration increased, and also exhibited enantioselectivity.…”

Section: Discussionmentioning

confidence: 99%

Enantioselective Phytotoxicity of the Herbicide Imazethapyr on the Response of the Antioxidant System and Starch Metabolism in Arabidopsis thaliana

Qian

Peng

et al. 2011

PLoS ONE

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BackgroundThe enantiomers of a chiral compound possess different biological activities, and one of the enantiomers usually shows a higher level of toxicity. Therefore, the exploration of the causative mechanism of enantioselective toxicity is regarded as one of primary goals of biological chemistry. Imazethapyr (IM) is an acetolactate synthase (ALS)-inhibiting chiral herbicide that has been widely used in recent years with racemate. We investigated the enantioselectivity between R- and S-IM to form reactive oxygen species (ROS) and to regulate antioxidant gene transcription and enzyme activity.ResultsDramatic differences between the enantiomers were observed: the enantiomer of R-IM powerfully induced ROS formation, yet drastically reduced antioxidant gene transcription and enzyme activity, which led to an oxidative stress. The mechanism by which IM affects carbohydrate metabolism in chloroplasts has long remained a mystery. Here we report evidence that enantioselectivity also exists in starch metabolism. The enantiomer of R-IM resulted in the accumulation of glucose, maltose and sucrose in the cytoplasm or the chloroplast and disturbed carbohydrates utilization.ConclusionThe study suggests that R-IM more strongly retarded plant growth than S-IM not only by acting on ALS, but also by causing an imbalance in the antioxidant system and the disturbance of carbohydrate metabolism with enantioselective manner.

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Section: Discussionmentioning

confidence: 99%

Enantioselective Phytotoxicity of the Herbicide Imazethapyr on the Response of the Antioxidant System and Starch Metabolism in Arabidopsis thaliana

Qian

Peng

et al. 2011

PLoS ONE

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“…Soil pollution with numerous heavy metals (HMs) is becoming a challenging task for agricultural sustainability. Chromium (Cr) and aluminum (Al) are considered major environmental contaminants causing fluctuations in plant metabolism, thus inhibiting plant growth and overall crop productivity . Anthropogenic activities, mining and metalworking industries, industrial effluents, waste incinerators, automobile exhausts, metal plating and finishing operations, cement factories, pesticides and fertilizers manufacturing, etc., are the main sources of heavy metal pollution that are posing serious threats to agro‐ecosystems.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, hampered root growth followed by limited nutrient absorption and poor water uptake and low productivity are the main Al‐induced toxic symptoms in plants . When entering plants, Cr and Al disrupt cell structures and functions, cause leaf chlorosis, hinder enzymatic activities, and interfere with the crop growth cycle .…”

Section: Introductionmentioning

confidence: 99%

Chromium and Aluminum Phytotoxicity in Maize: Morpho‐Physiological Responses and Metal Uptake

Anjum

Ashraf

Khan

et al. 2016

CLEAN Soil Air Water

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The present study investigated the uptake, translocation, and accumulation of chromium (Cr 6þ ) and aluminum (Al 3þ ) in maize and their induced variations in morpho-physiological and biochemical attributes as well as growth behavior and yield formation. Plants were grown in pots supplied with heavy metals, alone and in combination (chromium (Cr), aluminum (Al) and chromium þ aluminum (Cr þ Al)) while pots without adding Cr or Al were regarded as control. Metal stress considerably reduced growth and yield related attributes as well as photosynthetic pigments of maize. However, production of hydrogen peroxide (H 2 O 2 ), thiobarbituric acid and activities of ascorbate peroxidase, glutathione reductase, glutathione peroxidase, and ascorbic acid were substantially increased under Cr and Al stress. A significant increase in soluble sugars and total phenolic contents were recorded in plants exposed to Cr and Al stress. Furthermore, all physiological attributes were increased with plant age except chlorophyll. Interestingly, Cr alone was proved more toxic to maize than Al alone. Cr and Al accumulation varied significantly (p 0.05) among different plant organs as roots > stem > leaves > corn ear > grains, whereas degrees of translocations were higher from stem to other plant parts than roots to stem. Accumulation of Cr and Al in either above-or below-ground plant parts are negatively correlated with grains and biological yield. The overall trend of metal stress on plant growth and yield were perceived as: Cr þ Al > Cr > Al > control. Furthermore, synergistic effects of Cr þ Al were more prominent than the individual effects of Cr and Al alone.

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“…Starting the current trend for the use of WAM, Niu et al (2004) studied other aspects such as gas exchange and chlorophyll fluorescence response to simulated rainfall in plants under water stress by measuring leaf water potential. Other authors such as YuBing et al (2007), Xu and Zhou (2008), and Li et al (2010) used WAM in their research, but the suitability of the use of this type of TCP in the field has not been verified.…”

Section: Measurement Of Leaf Water Potentialmentioning

confidence: 99%

Review. Use of psychrometers in field measurements of plant material: accuracy and handling difficulties

Martínez¹,

Cancela²,

García³

et al. 1970

Span. j. agric. res.

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For years, one of the major concerns of agronomists has been the study of how variations in the crop environment can affect proper crop development. A variety of factors must be considered, including factors such as plant genetics, climatic conditions or soil, and factors directly dependent on man such as technology or labour. In the search for sustainable development, all these factors must coexist in perfect harmony in order AbstractThe determination of leaf water potential is useful in the establishment of irrigation guidelines for agricultural crop management practices and requires the use of various methods, among which thermocouple psychrometers (TCP). TCP have been widely used for this purpose. However, the psychrometric technique is complex and difficult to understand and the instrumentation required is difficult to handle. For this reason, a profound knowledge of the different aspects involved in the technique -which have not been clearly explained in the literature-is required. This paper reviews a number of research areas of TCP and focuses on three very specific fields: a) main applications of phsychrometry in field studies; b) determination of the measurement accuracy of psychrometric equipment, accuracy per se and accuracy tested against alternative methods; c) main errors and handling difficulties of TCP in the field. Research in these areas provides an updated overview of TCP as a method for determining water relations in plant material that will contribute criteria to select the most suitable technique according to the type of plant material and the purpose of the research and will highlight the types of instruments, accuracies and errors that have detrimental effects on measurements.Additional key words: hygrometric technique; irrigation; isopiestic technique; pressure chamber; psychrometric technique. ResumenRevisión. Aplicación de la psicrometría en campo a material vegetal: precisión y dificultades de manejo La determinación del potencial hídrico foliar es muy útil en el establecimiento de directrices de riego en las prácti-cas de manejo agrícola de los cultivos, requiriéndose del uso de diferentes métodos como los psicrómetros termopar (TCP). Los TCP han sido ampliamente utilizados. Sin embargo, se trata de una técnica compleja de difícil manejo. Por lo tanto, se requiere un profundo conocimiento de los diferentes aspectos involucrados en la técnica, que no han sido claramente explicados en los diferentes estudios publicados. Este artículo revisa una serie de líneas de investigación de los TCP. Estas áreas de investigación se han centrado en tres campos muy específicos: a) principales actuaciones en campo empleando la psicrometría; b) especificación de la precisión de los equipos, per se y frente a otras metodologías alternativas; c) principales errores y dificultades de manejo en campo de los psicrómetros. La investigación en esta área permitirá aportar una visión actualizada sobre los TCP como método de determinación de relaciones hídricas en material vegetal, aportando criterios de sele...

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Physiological responses and comparative transcriptional profiling of maize roots and leaves under imposition and removal of aluminium toxicity

Cited by 14 publications

References 29 publications

Enantioselective Phytotoxicity of the Herbicide Imazethapyr on the Response of the Antioxidant System and Starch Metabolism in Arabidopsis thaliana

Enantioselective Phytotoxicity of the Herbicide Imazethapyr on the Response of the Antioxidant System and Starch Metabolism in Arabidopsis thaliana

Chromium and Aluminum Phytotoxicity in Maize: Morpho‐Physiological Responses and Metal Uptake

Review. Use of psychrometers in field measurements of plant material: accuracy and handling difficulties

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