Effects of different levels of water stress on leaf photosynthetic characteristics and antioxidant enzyme activities of greenhouse tomato

2016 ◽  
Vol 54 (1) ◽  
pp. 28-39 ◽  
Author(s):  
X. K. Yuan ◽  
Z. Q. Yang ◽  
Y. X. Li ◽  
Q. Liu ◽  
W. Han
Keyword(s):  
Water Stress ◽  
Antioxidant Enzyme ◽  
Enzyme Activities ◽  
Photosynthetic Characteristics ◽  
Antioxidant Enzyme Activities ◽  
Greenhouse Tomato ◽  
Different Levels

scholarly journals Antioxidant enzyme activities in Allium species and their cultivars under water stress

2008 ◽  
Vol 53 (No. 12) ◽  
pp. 517-523 ◽  
Author(s):  
J. Csiszár ◽  
E. Lantos ◽  
I. Tari ◽  
E. Madoşă ◽  
B. Wodala ◽  
...  
Keyword(s):  
Water Stress ◽  
Water Content ◽  
Antioxidant Enzyme ◽  
Enzyme Activities ◽  
Moisture Stress ◽  
Water Withdrawal ◽  
Antioxidant Enzyme Activities ◽  
Glutathione S Transferase ◽  
Soil Moisture Stress ◽  
Relative Water

We compared the enzymatic antioxidative defence mechanisms of some regional subspecies of <I>Allium (A. cepa </I>L., <I>A. ascalonicum</I> auct. hort., A.<I> sativum</I> L.) cultivated mainly in the western regions of Romania, and two modern Hungarian climate resistant F <sub>1</sub> hybrids. The variability in the activities of antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), glutathione reductase (GR) and glutathione S-transferase (GST) and their changes under soil moisture stress were investigated. 1-week-long water stress revealed that among three <I>Allium</I> species, relative water content decreased only in <I>A. ascalonicum</I> leaves (up to 16%). Unlike root enzymes, the activities of the shoot enzymes, especially POD, GR and GST showed a stronger correlation with the water content of the leaves after one week of water withdrawal; regression coefficients (<I>R</I><sup>2</sup>) were 0.359, 0.518 and 0.279, respectively. The ancient populations with elevated (or highly inducible) antioxidant enzyme activities may be interesting for further research and for breeding of new <I>Allium</I> varieties.

Effects of soil drought stress on photosynthetic characteristics and antioxidant enzyme activities inHippophae rhamnoidesLinn. seedings

2013 ◽  
Vol 33 (5) ◽  
pp. 1386-1396 ◽  
Author(s):  
裴斌 PEI Bin ◽  
张光灿 ZHANG Guangcan ◽  
张淑勇 ZHANG Shuyong ◽  
吴芹 WU Qin ◽  
徐志强 XU Zhiqiang ◽  
...  
Keyword(s):  
Drought Stress ◽  
Antioxidant Enzyme ◽  
Enzyme Activities ◽  
Photosynthetic Characteristics ◽  
Soil Drought ◽  
Antioxidant Enzyme Activities

scholarly journals Effect of hydric and light stress on biomass, nutrient uptake and enzymatic antioxidants of Argania spinosa seedlings

2021 ◽  
pp. 10-10
Author(s):  
Abdouroihamane Hachemi ◽  
Ouswati Said Ali ◽  
Tarik Belghazi ◽  
Abderrahman Lahrouni ◽  
Said El Mercht ◽  
...  
Keyword(s):  
Water Stress ◽  
Antioxidant Enzyme ◽  
Enzyme Activities ◽  
Light Stress ◽  
Phosphorus Uptake ◽  
Interactive Effects ◽  
Antioxidant Enzyme Activities ◽  
Total Biomass ◽  
Enzymatic Antioxidants ◽  
Argania Spinosa

Sunlight and water are factors that affect seedling development. However, the effects of acclimatization of seedlings to sunlight and water stress remain poorly understood. This study aimed to examine the interactive effects of acclimatization to light and water stress on argan tree (Argania spinosa) seedlings in nurseries. An experiment was conducted with 504 seedlings using two sunlight treatments (L1 and L2, i.e. 100% and 60% of full sunlight, respectively), and three watering treatments (well-watered, moderate stress and severe stress, i.e. 100%, 50% and 25% of field capacity, respectively). According to our results, water stress treatments caused a reduction in total biomass accumulation, nitrogen and phosphorus uptake. Water stress significantly increased other macroelements, H2O2 and MDA levels and antioxidant enzyme activities compared to well-watered seedlings. Seedlings grown under moderate shade (L2) showed higher macroelement uptake, which probably contributed to the increase in total biomass in all water treatments. The highest membrane stability index (MSI) values, H2O2 and MDA levels and lowest antioxidant enzyme activities were recorded in acclimatized argan seedlings under moderate shading (L2). These results suggest that moderate shade can effectively prevent stress caused by light excess and can also mitigate the harmful effects of water stress on A. spinosa seedlings.

Sign in / Sign up

Export Citation Format

Share Document