Abstract
Projected global warming is expected to increase the occurrence of heat-induced floret sterility (HIFS) in rice. However, there are few field-scale studies that could aid in predicting the potential risks to rice yield and developing countermeasures against yield losses. The aim of this study was to elucidate the factors that induce floret sterility under high temperature conditions during the flowering season in the field condition in China. Studies were conducted in irrigated paddy fields with the regional hybrid-rice cultivars grown in Jianghan Basin where air temperature is not so high during the flowering season but HIFS frequently occurs. The microclimate, panicle temperature, floret sterility, pollination, and size of dehiscence formed at the base of anthers were investigated. Significant losses in seed set were observed under the high temperature condition. Although the maximum atmospheric temperature was approximately 35ºC, the relative humidity was very high (around 70% at the time of maximum temperature), with low wind speeds, occasionally below 1 m s1. Under such conditions sunlit panicle temperature exceeded atmospheric temperature by as much as 4ºC. Moreover, the anthers of some cultivars exhibited short basal dehiscence, and the dehiscence length was positively correlated with the percentage of sufficiently pollinated florets (r=0.859, P<0.05, n=7) and with seed set (r=0.827, P<0.05, n=7) across the cultivars. The results suggest that the combination of hot, humid, and windless climatic conditions with short basal dehiscence of anthers induces HIFS in hybrid rice grown in this region.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
High temperature caused significant seed-set losses.
- Taxon
- rice
Oryza sativat0 - Treatment
- high temperature conditione0
- Outcome
- seed sete0
- Direction
- lossese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant losses in seed set were observed under the high temperature condition.”
t0“rice”
Claim · model-written summary
Under hot, humid, low-wind conditions, sunlit panicles exceeded atmospheric temperature by up to 4ºC.
- Taxon
- riceOryza sativat0
- Organ / stage
- paniclee0
- Outcome
- panicle temperaturee0
- Direction
- exceedede0
- Value
- 4ºCe0
- Comparator
- atmospheric temperaturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under such conditions sunlit panicle temperature exceeded atmospheric temperature by as much as 4ºC.”
t0“rice”
Claim · model-written summary
Some rice cultivars had short basal anther dehiscence.
- Taxon
- riceOryza sativat0
- Organ / stage
- antherse0
- Outcome
- short basal dehiscencee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the anthers of some cultivars exhibited short basal dehiscence”
t0“rice”
Claim · model-written summary
Basal dehiscence length correlated positively with sufficiently pollinated florets (r=0.859, P<0.05, n=7).
- Taxon
- riceOryza sativat0
- Organ / stage
- floretse0
- Outcome
- percentage of sufficiently pollinated floretse0
- Direction
- positively correlatede0
- Value
- r=0.859e0
- Qualifier
- P<0.05, n=7e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dehiscence length was positively correlated with the percentage of sufficiently pollinated florets (r=0.859, P<0.05, n=7)”
t0“rice”
Claim · model-written summary
Basal dehiscence length correlated positively with seed set (r=0.827, P<0.05, n=7).
- Taxon
- riceOryza sativat0
- Organ / stage
- dehiscencee0
- Outcome
- seed sete0
- Direction
- positively correlatede0
- Value
- r=0.827e0
- Qualifier
- P<0.05, n=7e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dehiscence length was positively correlated with the percentage of sufficiently pollinated florets (r=0.859, P<0.05, n=7) and with seed set (r=0.827, P<0.05, n=7)”
t0“rice”
Claim · model-written summary
Authors inferred that hot, humid, windless conditions combined with short anther dehiscence induce rice floret sterility in the region.
- Taxon
- riceOryza sativae0
- Outcome
- HIFSe0
- Qualifier
- hot, humid, and windless climatic conditions with short basal dehiscence of antherse0
- Setting
- this regione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results suggest that the combination of hot, humid, and windless climatic conditions with short basal dehiscence of anthers induces HIFS in hybrid rice grown in this region.”
The same questions in other papers
heat · yield · Oryza sativa (rice)Positive and negative results
158 papers in the same direction as this paper · 36 in the opposite direction
- positive
- negative
- negative
191 papers more in this group
See all 195 papers →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.