| The Content Variation of Natural Product Induced by Different Factor(s) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Species Name: Lentil var. Tina | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Factor Name: H2O2 Treatment; Mannitol Treatment; NaCl Treatment; High Temperature Treatment; Low Temperature Treatment | [1] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Experiment Detail |
Seeds were sterilized in 1% (v/v) sodium hypochloride (Sigma-Aldrich, USA) for 10 min, then drained and washed with distilled water until they reached neutral pH. They were placed in distilled water and soaked for 6 h at 25 ℃ . Seeds were dark germinated for 8 days in a growth chamber (SANYO MLR-350H) on Petri dishes (125 mm) lined with absorbent paper. Seedlings were watered with 5 ml of Milli-Q water daily. Sprout (8-day-old) samples were gently collected, weighed (fresh mass), rapidly frozen and kept in polyethylene bags at -20 ℃ . For each treatment, three replicates were performed.Elicitation conditions were selected in previous screening studies. For the experiments, temperature (4 ℃ and 40 ℃ - TC and TH, respectively), H2O2 (20 mM and 200 mM - Ox1 and Ox2, respectively), mannitol (200 mM and 600 mM - Os1 and Os2, respectively) and NaCl (100 mM and 300 mM - S-Os1 and S-Os2, respectively) were selected as abiotic elicitors. All solutions were freshly prepared before each application. Mannitol (Os1, Os2), NaCl (S-O1, S-O2) and H2O2 (Ox1) treatments were applied by watering daily (not soaking) 2-day-old sprouts with 5 ml of test solution. For Ox2 (200 mM H2O2) treatment 2-day-old seedlings were only once watered with 5 ml of 200 mM H2O2 and then cultivated under standard conditions. For temperature conditioning treatment, 2-day-old sprouts were incubated at 4 ℃ and 40 ℃ (TC and TH, respectively) for 1 h and then cultivated under standard conditions. Sprout (8-day-old) samples were gently collected, weighed (fresh mass), rapidly frozen and kept in polyethylene bags at -20 ℃ .
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| Factor Function |
Application of abiotic elicitors (environmental shocks) was an effective method for improvement of sprout pro-health potential via an increase of phenolic contents and subsequent elevation of antioxidant potential. Innovative application of elicitors on 2-day-old sprouts (not seed) allowed the elimination of the unfavorable influence of the factors employed on germination yield and biomass production. Assuming that the optimal germination conditions are those which most effectively increase the antioxidant potential without any negative influence on biomass accumulation and nutritional quality the elicitation with 20 mM H2O2 for the future applications is recommended.
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| Factor | Part | Location | NP Content | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Normal condition
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Sprouts | NA |
NP Content: 0.00017 ± 0.00001 mg/g flour
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Induction with 20 mM H2O2
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Sprouts | NA |
NP Content: 0.00027 ± 0.00001 mg/g flour
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Induction with 200 mM H2O2
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Sprouts | NA |
NP Content: 0.00072 ± 0.00012 mg/g flour
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Induction with 200 mM mannitol
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Sprouts | NA |
NP Content: 0.00156 ± 0.00014 mg/g flour
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Induction with 600 mM mannitol
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Sprouts | NA |
NP Content: 0.00106 ± 0.00012 mg/g flour
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Induction with 100 mM NaCl
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Sprouts | NA |
NP Content: 0.00014 ± 0 mg/g flour
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Induction with 300 mM NaCl
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Sprouts | NA |
NP Content: 0.0001 ± 0.00001 mg/g flour
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Induction at 4 ℃
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Sprouts | NA |
NP Content: 0.00012 ± 0.00001 mg/g flour
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Induction at 40 ℃
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Sprouts | NA |
NP Content: 0.00039 ± 0.00002 mg/g flour
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| References | ||||||||||||||||||||||||
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| 1 | Elicitation with abiotic stresses improves pro-health constituents, antioxidant potential and nutritional quality of lentil sprouts | |||||||||||||||||||||||