Abstract
The effects of exogenousethylene, 1-aminocyclopropane- 1-carboxylic acid (ACC), and ethephon ongermination of alfalfa (Medicago sativa L. ) seeds under saline and nonsalinecondition were studied. Under nonsaline condition the addition of exogenous ethylene promoted germination ofalfalfa seeds, but did not affect the final gertmination rate (Fig. 1 ). Salinity severely inhibited germination of alfalfa seeds. The addition of 1 to 50 μl/L (v/v) ethylene to the atmospheresurrounding the seeds significantly alleviated the inhibition of seed germination by NaCl (Fig. 2). So did the addition of ACC(0. 1￣5. 0 mmol/L, Fig.3) or ethephon (5 - 100 mg/L, Fig.6) to the incubation medium. Kinetin(KT) had the similar effect, and inaddition it could enhance the ethyleneproduction in g6rminating seeds. Acombination of ACC and KT synergistically promoted germination of under stress condition (Fig. 4). A enhancement of ethylene production occurred under NaCl stress in the presence of KT + ACC (Fig. 5 ). Alfalfaseeds soaked in 0. 25 mol NaCl/L solution for 72 h did not germinate at all.However, the seeds soaked in 0. 25mol NaCl/L solution for 8, 12, 24,48 and 72 h begun to germinate whenever oxogenous ethylene was added(Fig. 8). Under salinity sirers throughethylene or ethephon treatment promoted seed germination, it reduced theshoot fresh weight and hypocotyllength of gertininated seeds as compered with control (-NaCl).
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Claims 12
Claim · model-written summary
Exogenous ethylene promoted seed germination under nonsaline conditions.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- exogenous ethylenee1
- Outcome
- germinatione1
- Direction
- promotede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Stressed Alfalfa Seeds”
e1“Under nonsaline condition the addition of exogenous ethylene promoted germination ofalfalfa seeds, but did not affect the final gertmination rate”
Claim · model-written summary
Exogenous ethylene did not affect the final germination rate of alfalfa seeds under nonsaline conditions.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- exogenous ethylenee1
- Outcome
- final gertmination ratee1
- Direction
- did not affecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Stressed Alfalfa Seeds”
e1“Under nonsaline condition the addition of exogenous ethylene promoted germination ofalfalfa seeds, but did not affect the final gertmination rate”
Claim · model-written summary
Salinity severely inhibited germination of alfalfa seeds.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- Salinitye2
- Outcome
- germinatione2
- Direction
- severely inhibitede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Stressed Alfalfa Seeds”
e2“Salinity severely inhibited germination of alfalfa seeds”
Claim · model-written summary
Added ethylene at 1 to 50 μl/L significantly alleviated the NaCl inhibition of seed germination.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- 1 to 50 μl/L (v/v) ethylenee3
- Outcome
- inhibition of seed germinatione3
- Direction
- significantly alleviatede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Stressed Alfalfa Seeds”
e3“The addition of 1 to 50 μl/L (v/v) ethylene to the atmospheresurrounding the seeds significantly alleviated the inhibition of seed germination by NaCl”
Claim · model-written summary
ACC alleviated the NaCl inhibition of alfalfa seed germination.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- ACCe5
- Outcome
- inhibition of seed germinatione3
- Direction
- alleviatede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Stressed Alfalfa Seeds”
e3“The addition of 1 to 50 μl/L (v/v) ethylene to the atmospheresurrounding the seeds significantly alleviated the inhibition of seed germination by NaCl”
e5“So did the addition of ACC”
Claim · model-written summary
Ethephon alleviated the NaCl inhibition of alfalfa seed germination.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- ethephon (5 - 100 mg/Le6
- Outcome
- inhibition of seed germinatione3
- Direction
- alleviatede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Stressed Alfalfa Seeds”
e3“The addition of 1 to 50 μl/L (v/v) ethylene to the atmospheresurrounding the seeds significantly alleviated the inhibition of seed germination by NaCl”
e6“or ethephon (5 - 100 mg/L”
Claim · model-written summary
Kinetin had a similar alleviating effect on the NaCl inhibition of alfalfa seed germination.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- Kinetin(KT)e7
- Outcome
- inhibition of seed germinatione3
- Direction
- similar effecte7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Stressed Alfalfa Seeds”
e3“The addition of 1 to 50 μl/L (v/v) ethylene to the atmospheresurrounding the seeds significantly alleviated the inhibition of seed germination by NaCl”
e7“Kinetin(KT) had the similar effect”
Claim · model-written summary
Combined ACC and kinetin synergistically promoted alfalfa seed germination under salt stress.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- ACC and KTe4
- Outcome
- germinatione4
- Direction
- synergistically promotede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Stressed Alfalfa Seeds”
e4“Acombination of ACC and KT synergistically promoted germination of under stress condition”
Claim · model-written summary
Under NaCl stress, the combination of KT and ACC enhanced ethylene production in alfalfa seeds.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- KT + ACCe4
- Outcome
- ethylene productione4
- Direction
- enhancemente4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Stressed Alfalfa Seeds”
e4“A enhancement of ethylene production occurred under NaCl stress in the presence of KT + ACC”
Claim · model-written summary
Alfalfa seeds soaked in 0.25 mol/L NaCl for 72 h did not germinate at all.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- 0. 25 mol NaCl/L solution for 72 he4
- Outcome
- germinatee4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Stressed Alfalfa Seeds”
e4“Alfalfaseeds soaked in 0. 25 mol NaCl/L solution for 72 h did not germinate at all”
Claim · model-written summary
Alfalfa seeds soaked in 0.25 mol/L NaCl for 8 to 72 h began to germinate when exogenous ethylene was added.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- oxogenous ethylenee4
- Outcome
- begun to germinatee4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Stressed Alfalfa Seeds”
e4“the seeds soaked in 0. 25mol NaCl/L solution for 8, 12, 24,48 and 72 h begun to germinate whenever oxogenous ethylene was added”
Claim · model-written summary
Under salinity, ethylene or ethephon reduced shoot fresh weight and hypocotyl length of germinated alfalfa seeds compared with the control without NaCl.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- ethylene or ethephone5
- Outcome
- shoot fresh weight and hypocotyllengthe4
- Direction
- reducede4
- Comparator
- control (-NaCl)e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Stressed Alfalfa Seeds”
e4“it reduced theshoot fresh weight and hypocotyllength of gertininated seeds as compered with control (-NaCl)”
e5“Under salinity sirers throughethylene or ethephon treatment promoted seed germination”
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