Novel insights into the Citrus sinensis nonhost response suggest photosynthesis decline, abiotic stress networks and secondary metabolism modifications

2015 ◽  
Vol 42 (8) ◽  
pp. 758 ◽  
Author(s):  
Lucas D. Daurelio ◽  
M. Laura Tondo ◽  
M. Soledad Romero ◽  
Paz Merelo ◽  
Adriana A. Cortadi ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Secondary Metabolism ◽  
Citrus Sinensis ◽  
Xanthomonas Campestris ◽  
Carotenoid Biosynthesis ◽  
Citrus Canker ◽  
Stress Factors ◽  
Breeding Programs ◽  
Living Organisms ◽  
Shock Proteins

Plants are constantly exposed to stress factors. Biotic stress is produced by living organisms such as pathogens, whereas abiotic stress by unfavourable environmental conditions. In Citrus species, one of the most important fruit crops in the world, these stresses generate serious limitations in productivity. Through biochemical and transcriptomic assays, we had previously characterised the Citrus sinensis (L.) Osbeck nonhost response to Xanthomonas campestris pv. vesicatoria (Doidge), in contrast to Asiatic citrus canker infection caused by Xanthomonas citri subsp. citri (Hasse). A hypersensitive response (HR) including changes in the expression of several transcription factors was reported. Here, a new exhaustive analysis of the Citrus sinensis transcriptomes previously obtained was performed, allowing us to detect the over-representation of photosynthesis, abiotic stress and secondary metabolism processes during the nonhost HR. The broad downregulation of photosynthesis-related genes was correlated with an altered photosynthesis physiology. The high number of heat shock proteins and genes related to abiotic stress, including aquaporins, suggests that stresses crosstalk. Additionally, the secondary metabolism exhibited lignin and carotenoid biosynthesis modifications and expression changes in the cell rescue GSTs. In conclusion, novel features of the Citrus nonhost HR, an important part of the plants’ defence against disease that has yet to be fully exploited in plant breeding programs, are presented.

scholarly journals Influence of abiotic stress during soybean germination followed by recovery on the phenolic compounds of radicles and their antioxidant capacity

2014 ◽  
Vol 83 (3) ◽  
pp. 209-218 ◽  
Author(s):  
Sylwia Swigonska ◽  
Ryszard Amarowicz ◽  
Angelika Król ◽  
Agnieszka Mostek ◽  
Anna Badowiec ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Phenolic Compounds ◽  
Osmotic Stress ◽  
Antioxidant Capacity ◽  
Secondary Metabolism ◽  
Phenolic Acids ◽  
Stress Factors ◽  
Stress Recovery ◽  
Soybean Seeds ◽  
Post Stress

Abiotic stress factors are among the major causes of lower crop yields. It is known, that in response to cold and/or osmotic stress, crops activate various defense mechanisms, including morphological, physiological and metabolic adaptations. Secondary metabolism, especially phenolic compounds, seem to be an important factor of stress-induced metabolic re-engineering as their levels are alternated by abiotic stress in plants. Despite the fact, that the nature and function of phenolic compounds was already studied in various plant species, it is important to define tissue-specific changes induced by two most potent abiotic stressors – low temperature and decreased water potential. Moreover, in fields, the appearance of single stress is rather rare. Usually two or more factors are acting in parallel, which may potentially result in different effects. Therefore, the aim of this study was to analyze selected elements of secondary metabolism in roots of germinating soybean seeds under cold stress, osmotic stress and both stresses combined. In addition the effects of constant and persistent stress were compared to those induced by sudden and brief stress appearance, as well as after the post-stress recovery process. In the presented study standard methods for identification and quantification of phenolic acids and isoflavones were used and the antioxidant capacity of the radicle extracts was measured. The phenolic metabolism in plants was greatly intensified in response to cold and osmotic stress and remained at high level during the post-stress recovery. The amount and composition of both phenolic acids and identified isoflavones also changed in stress- and duration-dependent manner. This proves an important role of phenolic compounds in abiotic stress response of germinating soybean seeds and opens up new perspectives for further investigations.

scholarly journals First report of citrus canker caused by Xanthomonas campestris pv. citri on Citrus sinensis in Bolivia

2002 ◽  
Vol 51 (3) ◽  
pp. 383-383 ◽  
Author(s):  
M. Braithwaite ◽  
R. P. Leite ◽  
J. J. Smith ◽  
E. Boa ◽  
G. S. Saddler
Keyword(s):  
Citrus Sinensis ◽  
Xanthomonas Campestris ◽  
Citrus Canker ◽  
First Report

scholarly journals Jute Responses and Tolerance to Abiotic Stress: Mechanisms and Approaches

Plants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1595
Author(s):  
Khussboo Rahman ◽  
Naznin Ahmed ◽  
Md. Rakib Hossain Raihan ◽  
Farzana Nowroz ◽  
Faria Jannat ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Stress Responses ◽  
Growth Yield ◽  
Climatic Conditions ◽  
Stress Factors ◽  
Growth Physiology ◽  
Abiotic Stress Factors ◽  
Hot And Humid Climates ◽  
Adverse Environmental Conditions ◽  
Cold Metal

Jute (Corchorus spp.) belongs to the Malvaceae family, and there are two species of jute, C. capsularis and C. olitorious. It is the second-largest natural bast fiber in the world according to production, which has diverse uses not only as a fiber but also as multiple industrial materials. Because of climate change, plants experience various stressors such as salt, drought, heat, cold, metal/metalloid toxicity, and flooding. Although jute is particularly adapted to grow in hot and humid climates, it is grown under a wide variety of climatic conditions and is relatively tolerant to some environmental adversities. However, abiotic stress often restricts its growth, yield, and quality significantly. Abiotic stress negatively affects the metabolic activities, growth, physiology, and fiber yield of jute. One of the major consequences of abiotic stress on the jute plant is the generation of reactive oxygen species, which lead to oxidative stress that damages its cellular organelles and biomolecules. However, jute’s responses to abiotic stress mainly depend on the plant’s age and type and duration of stress. Therefore, understanding the abiotic stress responses and the tolerance mechanism would help plant biologists and agronomists in developing climate-smart jute varieties and suitable cultivation packages for adverse environmental conditions. In this review, we summarized the best possible recent literature on the plant abiotic stress factors and their influence on jute plants. We described the possible approaches for stress tolerance mechanisms based on the available literature.

scholarly journals Plant-Microbe Interactions in Alleviating Abiotic Stress—A Mini Review

2021 ◽  
Vol 3 ◽  
Author(s):  
Michael Prabhu Inbaraj
Keyword(s):  
Abiotic Stress ◽  
Plant Growth ◽  
Mycorrhizal Fungi ◽  
Abiotic Stresses ◽  
Current Knowledge ◽  
Crop Plants ◽  
Stress Factors ◽  
Limiting Factors ◽  
Nutrient Deficiencies ◽  
The Impact

Crop plants are continuously exposed to various abiotic stresses like drought, salinity, ultraviolet radiation, low and high temperatures, flooding, metal toxicities, nutrient deficiencies which act as limiting factors that hampers plant growth and low agricultural productivity. Climate change and intensive agricultural practices has further aggravated the impact of abiotic stresses leading to a substantial crop loss worldwide. Crop plants have to get acclimatized to various environmental abiotic stress factors. Though genetic engineering is applied to improve plants tolerance to abiotic stresses, these are long-term strategies, and many countries have not accepted them worldwide. Therefore, use of microbes can be an economical and ecofriendly tool to avoid the shortcomings of other strategies. The microbial community in close proximity to the plant roots is so diverse in nature and can play an important role in mitigating the abiotic stresses. Plant-associated microorganisms, such as endophytes, arbuscular mycorrhizal fungi (AMF), and plant growth-promoting rhizobacteria (PGPR), are well-documented for their role in promoting crop productivity and providing stress tolerance. This mini review highlights and discusses the current knowledge on the role of various microbes and it's tolerance mechanisms which helps the crop plants to mitigate and tolerate varied abiotic stresses.

Management of Citrus Canker by Eradication of Xanthomonas Campestris pv. Citri

1987 ◽  
pp. 900-905 ◽  
Author(s):  
R. E. Stall ◽  
E. L. Civerolo ◽  
E. P. Ducharme ◽  
C. J. Krass ◽  
S. R. Poe ◽  
...  
Keyword(s):  
Xanthomonas Campestris ◽  
Citrus Canker
Sign in / Sign up

Export Citation Format

Share Document