scholarly journals Improving Plant Growth and Alleviating Photosynthetic Inhibition and Oxidative Stress From Low-Light Stress With Exogenous GR24 in Tomato (Solanum lycopersicum L.) Seedlings

2019 ◽  
Vol 10 ◽  
Author(s):  
Tao Lu ◽  
Hongjun Yu ◽  
Qiang Li ◽  
Lin Chai ◽  
Weijie Jiang
Keyword(s):  
Oxidative Stress ◽  
Plant Growth ◽  
Solanum Lycopersicum ◽  
Light Stress ◽  
Low Light ◽  
Photosynthetic Inhibition ◽  
Solanum Lycopersicum L ◽  
Low Light Stress ◽  
And Oxidative Stress

scholarly journals Comparative Physiological and Biochemical Changes in Tomato (Solanum lycopersicum L.) Under Salt Stress and Recovery: Role of Antioxidant Defense and Glyoxalase Systems

Antioxidants ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 350 ◽  
Author(s):  
Parvin ◽  
Hasanuzzaman ◽  
Bhuyan ◽  
Nahar ◽  
Mohsin ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Plant Growth ◽  
Solanum Lycopersicum ◽  
Nutrient Solution ◽  
Stress Responses ◽  
Antioxidant Defense ◽  
Oxygen Species ◽  
Tomato Plants ◽  
Solanum Lycopersicum L ◽  
Post Stress

Salinity toxicity and the post-stress restorative process were examined to identify the salt tolerance mechanism in tomato, with a focus on the antioxidant defense and glyoxalase systems. Hydroponically grown 15 day-old tomato plants (Solanum lycopersicum L. cv. Pusa Ruby) were treated with 150 and 250 mM NaCl for 4 days and subsequently grown in nutrient solution for a further 2 days to observe the post-stress responses. Under saline conditions, plants showed osmotic stress responses that included low leaf relative water content and high proline content. Salinity induced oxidative stress by the over-accumulation of reactive oxygen species (H2O2 and O2•−) and methylglyoxal. Salinity also impaired the non-enzymatic and enzymatic components of the antioxidant defense system. On the other hand, excessive Na+ uptake induced ionic stress which resulted in a lower content of other minerals (K+, Ca2+, and Mg2+), and a reduction in photosynthetic pigment synthesis and plant growth. After 2 days in the normal nutrient solution, the plants showed improvements in antioxidant and glyoxalase system activities, followed by improvements in plant growth, water balance, and chlorophyll synthesis. The antioxidant and glyoxalase systems worked in concert to scavenge toxic reactive oxygen species (ROS), thereby reducing lipid peroxidation and membrane damage. Taken together, these findings indicate that tomato plants can tolerate salinity and show rapid post-stress recovery by enhancement of their antioxidant defense and glyoxalase systems.

scholarly journals Metabolomic indicators for low-light stress in seagrass

2020 ◽  
Vol 114 ◽  
pp. 106316
Author(s):  
L.L. Griffiths ◽  
S.D. Melvin ◽  
R.M. Connolly ◽  
R.M. Pearson ◽  
C.J. Brown
Keyword(s):  
Light Stress ◽  
Low Light ◽  
Low Light Stress

Potassium starvation induces oxidative stress in Solanum lycopersicum L. roots

2012 ◽  
Vol 169 (14) ◽  
pp. 1366-1374 ◽  
Author(s):  
M. Hernandez ◽  
N. Fernandez-Garcia ◽  
J. Garcia-Garma ◽  
J.S. Rubio-Asensio ◽  
F. Rubio ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Solanum Lycopersicum ◽  
Solanum Lycopersicum L ◽  
Potassium Starvation

Distinction and characterisation of submergence tolerant and sensitive rice cultivars, probed by the fluorescence OJIP rise kinetics

2009 ◽  
Vol 36 (3) ◽  
pp. 222 ◽  
Author(s):  
Ramani Kumar Sarkar ◽  
Debabrata Panda
Keyword(s):  
Photosynthetic Rate ◽  
Oryza Sativa L ◽  
Indica Rice ◽  
Light Stress ◽  
Elongation Growth ◽  
Rice Cultivars ◽  
Low Light ◽  
Test Parameters ◽  
Fluorescence Characteristics ◽  
Low Light Stress

Rice (Oryza sativa L.) plants experience multiple abiotic stresses when they are submerged. In addition to the effects of submergence on gas exchange, water also creates shading of submerged plants. It is believed that responses to submergence are actually responses to low light stress, although during complete submergence in addition to low light other environmental factors like reduce movement of gases affect the plant growth, and therefore, the consequences of submergence are not always alike to shade. We monitored the extent to which shade and submergence change the plant height, chlorophyll a fluorescence characteristics and CO2 photosynthetic rate in three Indica rice cultivars, namely Sarala, Kalaputia and Khoda, which differed in submergence tolerance. There were both similarities and dissimilarities between the consequence of shade and submergence on rice plants. Under shade conditions, elongation growth was greater in submergence tolerant cultivars than the sensitive cultivar, whereas elongation growth was greater under submergence in sensitive cultivar. The reduction in chlorophyll content, damage to PSII, and decrease in CO2 photosynthetic rate was more notable under submergence than the shade conditions. Our results show that several JIP-test parameters clearly distinguish between submergence tolerant and sensitive cultivars, and responses to submergence among different rice cultivars differ depending on their sensitivity to submergence. There were different interactions between cultivar and shade (~low light) and cultivar and submergence.

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