Abstract
Exogenous application of ascorbic acid (AsA) has been shown to be an essential antioxidant agent involved in induction of systemic resistance response of plants after salt stress. Our study was carried out in the Department of Fertilization Technology at National Research Centre, Cairo, Egypt. This study aimed to study the effect of foliar spray with 100 ppm of ascorbic acid (AsA) on two maize cultivars (mono hybrid and triple hybrid) grown hydroponically. Growth parameters, total phenolics content (TFC), total flavonoids content (TFC) and their antioxidant activity, photosynthesis pigments, carbonic anhydrase (CAA, EC 4.2.1.1), peroxidase (POD, EC 1.11.1.7) and catalase (CAT, 1.11.1.6) activities were evaluated. Salt induced increase in TPC, TFC and their antioxidant activities. Salt stress negatively affected pigment contents, whereas antioxidant enzyme activities were increased. DPPH . scavenging activity correlated well with TPC and TFC. The results supported that DPPH . radical scavenging activity and Fe 2+ -chelating activity may be evaluated as reliable parameters to assess the ability of antioxidants to hinder salt stress. Foliar spray with AsA enhanced the activities of catalase, whereas peroxidase showed least effect. This study suggested that AsA application may induce an adaptive response in maize through stimulation of phenol and flavonoid biosynthesis and antioxidant enzyme activities.
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Claims 8
Claim · model-written summary
Salt increased phenolics, flavonoids, and their antioxidant activities.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt induced increase in TPC, TFC and their antioxidant activities”
t0“maize cultivars”
Claim · model-written summary
Salt stress lowered pigment contents.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress negatively affected pigment contents”
t0“maize cultivars”
Claim · model-written summary
Salt stress increased antioxidant enzyme activities.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress negatively affected pigment contents, whereas antioxidant enzyme activities were increased”
t0“maize cultivars”
Claim · model-written summary
DPPH scavenging activity correlated with phenolic and flavonoid contents.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DPPH . scavenging activity correlated well with TPC and TFC”
t0“maize cultivars”
Claim · model-written summary
DPPH radical scavenging and iron chelating activity were proposed as indicators of antioxidant ability under salt stress.
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DPPH . radical scavenging activity and Fe 2+ -chelating activity may be evaluated as reliable parameters to assess the ability of antioxidants to hinder salt stress”
t0“maize cultivars”
Claim · model-written summary
Foliar ascorbic acid enhanced catalase activity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar spray with AsA enhanced the activities of catalase”
t0“maize cultivars”
Claim · model-written summary
Peroxidase showed the least response to foliar ascorbic acid.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar spray with AsA enhanced the activities of catalase, whereas peroxidase showed least effect”
t0“maize cultivars”
Claim · model-written summary
The authors suggest ascorbic acid may induce adaptation through phenol, flavonoid and enzyme stimulation.
- Treatment
- AsA applicatione0
- Outcome
- adaptive responsee0
- Qualifier
- through stimulation of phenol and flavonoid biosynthesis and antioxidant enzyme activitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AsA application may induce an adaptive response in maize through stimulation of phenol and flavonoid biosynthesis and antioxidant enzyme activities”
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