Abstract
Severe barrenness of maize (Zea mays L.) occurred in 2003 in eastern Hokkaido (Konsen region), one of the coldest areas in Japan. In many fields, tassels with few or no spikelets were observed in the cultivar widely grown in this region. The anthesis date was delayed 7 days from the silking date in the cultivar in the field at Konsen Agricultural Experiment Station (KAES). In July, when the tassels were developing at the 6- to the 9-leaf stage, the air temperature and sunshine hours were much lower in 2003 than in the average year. Therefore, we hypothesized that the barrenness resulted from these specific climatic conditions in 2003. To examine this assumption, we applied low temperature treatment (10ºC for 7 days) to the plants of the cultivar widely grown in this region in 2003 at around the 6- to 9-leaf stage in a greenhouse at KAES. Tassels were formed at the 7-leaf stage, and developed but they did not reach their full-size at the 8-leaf stage. The tassel length was shorter when the plants were subjected to the low temperature treatment, especially at the 8-leaf stage. The days from silking to anthesis was increased by the treatment in 2 of the 3 test years. The present results suggest that the cultivar is sensitive to the low air temperature at the 8-leaf stage for the development of tassels and may result in barrenness.
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Claims 6
Claim · model-written summary
Low temperature treatment made tassels shorter, especially at the 8-leaf stage.
- Organ / stage
- 8-leaf stagee1
- Treatment
- low temperature treatmente1
- Outcome
- tassel lengthe1
- Direction
- shortere1
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Severe barrenness of maize (Zea mays L.) occurred in 2003 in eastern Hokkaido (Konsen region), one of the coldest areas in Japan”
e1“The tassel length was shorter when the plants were subjected to the low temperature treatment, especially at the 8-leaf stage”
Claim · model-written summary
Low temperature treatment increased the days from silking to anthesis in 2 of 3 test years.
- Treatment
- low temperature treatmente3
- Outcome
- days from silking to anthesise2
- Direction
- increasede2
- Qualifier
- in 2 of the 3 test yearse2
- Setting
- in a greenhousee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Severe barrenness of maize (Zea mays L.) occurred in 2003 in eastern Hokkaido (Konsen region), one of the coldest areas in Japan”
e2“The days from silking to anthesis was increased by the treatment in 2 of the 3 test years”
e3“we applied low temperature treatment (10ºC for 7 days) to the plants of the cultivar widely grown in this region in 2003 at around the 6- to 9-leaf stage in a greenhouse at KAES”
Claim · model-written summary
Severe barrenness of maize occurred in 2003 in eastern Hokkaido (Konsen region).
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Severe barrenness of maize (Zea mays L.) occurred in 2003 in eastern Hokkaido (Konsen region), one of the coldest areas in Japan”
Claim · model-written summary
Tassels with few or no spikelets were observed in fields in the widely grown cultivar.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Severe barrenness of maize (Zea mays L.) occurred in 2003 in eastern Hokkaido (Konsen region), one of the coldest areas in Japan”
e6“In many fields, tassels with few or no spikelets were observed in the cultivar widely grown in this region”
Claim · model-written summary
The cultivar is sensitive to low air temperature at the 8-leaf stage for tassel development, which may result in barrenness.
- Organ / stage
- 8-leaf stagee5
- Outcome
- development of tasselse5
- Qualifier
- sensitive to the low air temperaturee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Severe barrenness of maize (Zea mays L.) occurred in 2003 in eastern Hokkaido (Konsen region), one of the coldest areas in Japan”
e5“The present results suggest that the cultivar is sensitive to the low air temperature at the 8-leaf stage for the development of tassels and may result in barrenness”
Claim · model-written summary
Tassels were formed at the 7-leaf stage but did not reach full size at the 8-leaf stage.
- Organ / stage
- 8-leaf stagee4
- Outcome
- reach their full-sizee4
- Qualifier
- Tassels were formed at the 7-leaf stagee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Severe barrenness of maize (Zea mays L.) occurred in 2003 in eastern Hokkaido (Konsen region), one of the coldest areas in Japan”
e4“Tassels were formed at the 7-leaf stage, and developed but they did not reach their full-size at the 8-leaf stage”
The same questions in other papers
cold · phenology · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.