Abstract
Wild grass species (family Poaceae) of the genera Cenchrus , Digitaria , Echinochloa , Setaria and Urochloa , are widely conserved in seedbanks as important tropical forages, wild collected cereals and wild relatives of millets. The lack of knowledge on germination requirements and dormancy-breaking methodologies limits the conservation and use of these seedbank accessions. We present the results of germination experiments on 24 accessions belonging to 14 different species of these genera, considering both accessions conserved under long- term storage conditions for up to 43 years as well as freshly collected material. Different treatments were tested: (1) germination of intact dispersal units at 30/20°C; (2) germination of dehulled caryopses at 30/20°C; (3) germination of intact dispersal units at 25°C; and (4) germination of dehulled caryopses at 30/20°C with 250 mg L -1 GA 3 solution. Alternating temperatures promoted the germination of 18% of the tested accessions. Dehulling the caryopses enhanced the germination of 83% of the accessions, for 83% of the tested accessions caryopsis extraction coupled with the use of GA 3 further improved final germination. Overall, germination > 70% was obtained for 22 of the 24 tested accessions. The presented results can improve the management of seedbank accessions of these economically important crop wild relatives.
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Claims 4
Claim · model-written summary
Alternating temperatures promoted germination in 18% of accessions.
- Taxon
- Cenchrus , Digitaria , Echinochloa , Setaria and Urochloa
Setaria
Cenchrus
Urochloa
Echinochloa
Digitariat0 - Treatment
- Alternating temperaturese0
- Outcome
- germinatione0
- Direction
- promotede0
- Value
- 18%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alternating temperatures promoted the germination of 18% of the tested accessions.”
t0“Cenchrus , Digitaria , Echinochloa , Setaria and Urochloa”
Claim · model-written summary
Dehulling enhanced germination in 83% of accessions.
- Taxon
- Cenchrus , Digitaria , Echinochloa , Setaria and UrochloaSetariaCenchrusUrochloaEchinochloaDigitariat0
- Treatment
- Dehulling the caryopsese0
- Outcome
- germinatione0
- Direction
- enhancede0
- Value
- 83%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dehulling the caryopses enhanced the germination of 83% of the accessions”
t0“Cenchrus , Digitaria , Echinochloa , Setaria and Urochloa”
Claim · model-written summary
Caryopsis extraction with GA 3 further improved final germination in 83% of accessions.
- Taxon
- Cenchrus , Digitaria , Echinochloa , Setaria and UrochloaSetariaCenchrusUrochloaEchinochloaDigitariat0
- Treatment
- caryopsis extraction coupled with the use of GA 3e0
- Outcome
- final germinatione0
- Direction
- improvede0
- Value
- 83%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for 83% of the tested accessions caryopsis extraction coupled with the use of GA 3 further improved final germination.”
t0“Cenchrus , Digitaria , Echinochloa , Setaria and Urochloa”
Claim · model-written summary
Germination above 70% was achieved for 22 of 24 accessions.
- Taxon
- Cenchrus , Digitaria , Echinochloa , Setaria and UrochloaSetariaCenchrusUrochloaEchinochloaDigitariat0
- Outcome
- germinatione0
- Value
- > 70%e0
- Qualifier
- 22 of the 24 tested accessionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Overall, germination > 70% was obtained for 22 of the 24 tested accessions.”
t0“Cenchrus , Digitaria , Echinochloa , Setaria and Urochloa”