Abstract
The effects of different light qualities on the germination characteristics of a newly-discovered black-hulled weedy rice line that shows photoblastism was evaluated. In addition, the effects of rice hull and dark imbibition duration on germination was also studied. The germination percentage under white light was greater than 98% and less than 6% in darkness, indicating that the black-hulled weedy rice sees as positively photoblastic. While red light (R) stimulated germination, the germination was lower than in the white light treatment and the germination percentage of the seeds exposed to far-red light (FR) was similar to those maintained in darkness. The exposure to R for 30 sec. increased germination and this effect was saturated at an exposure of 15 min. The R effect was reversed by subsequent exposure to FR. Phytochrome control of the photoblastic weedy rice seed germination was confirmed by R/FR reversibility. The removal of the hull restored seed germination completely even in dark condition. Non-dormant weedy rice seeds imbibed in the dark enter a deep secondary dormancy, the depth of which was positively related to the duration of imbibition period. These results show that the black-hulled weedy rice seeds exhibit phytochrome-meditated photoblasticity, hull-imposed dormancy and secondary dormancy.
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Claims 8
Claim · model-written summary
Germination of black-hulled weedy rice was greater under white light (above 98%) than in darkness (below 6%).
- Taxon
- Oryza sativa L.
Oryza sativat0 - Treatment
- white lighte1
- Outcome
- germination percentagee1
- Direction
- greatere1
- Value
- greater than 98%e1
- Comparator
- darknesse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The germination percentage under white light was greater than 98% and less than 6% in darkness”
t0“Germination Characteristics of Photoblastic Weedy Rice (Oryza sativa L.) Seed”
Claim · model-written summary
Red light stimulated germination, but germination under red light was lower than under white light.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- red light (R)e2
- Outcome
- germinatione2
- Direction
- lowere2
- Comparator
- white light treatmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“While red light (R) stimulated germination, the germination was lower than in the white light treatment”
t0“Germination Characteristics of Photoblastic Weedy Rice (Oryza sativa L.) Seed”
Claim · model-written summary
Germination under far-red light was similar to that in darkness.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- far-red light (FR)e3
- Outcome
- germination percentagee3
- Direction
- similare3
- Comparator
- darknesse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“the germination percentage of the seeds exposed to far-red light (FR) was similar to those maintained in darkness”
t0“Germination Characteristics of Photoblastic Weedy Rice (Oryza sativa L.) Seed”
Claim · model-written summary
A 30 s red light exposure increased germination, and this effect saturated at a 15 min exposure.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- exposure to R for 30 sece4
- Outcome
- germinatione4
- Direction
- increasede4
- Qualifier
- effect was saturated at an exposure of 15 mine4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The exposure to R for 30 sec. increased germination and this effect was saturated at an exposure of 15 min”
t0“Germination Characteristics of Photoblastic Weedy Rice (Oryza sativa L.) Seed”
Claim · model-written summary
The red light effect on germination was reversed by subsequent far-red light exposure.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- subsequent exposure to FRe5
- Outcome
- R effecte5
- Direction
- reversede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The R effect was reversed by subsequent exposure to FR”
t0“Germination Characteristics of Photoblastic Weedy Rice (Oryza sativa L.) Seed”
Claim · model-written summary
Removing the hull restored seed germination completely, even in darkness.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- removal of the hulle6
- Outcome
- seed germinatione6
- Direction
- restorede6
- Qualifier
- completely even in dark conditione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The removal of the hull restored seed germination completely even in dark condition”
t0“Germination Characteristics of Photoblastic Weedy Rice (Oryza sativa L.) Seed”
Claim · model-written summary
Longer imbibition in the dark increased the depth of secondary dormancy in non-dormant weedy rice seeds.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- duration of imbibition periode7
- Outcome
- secondary dormancye0
- Direction
- increaseinferrede7
- Qualifier
- positively relatede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“the depth of which was positively related to the duration of imbibition period”
e0“Non-dormant weedy rice seeds imbibed in the dark enter a deep secondary dormancy”
t0“Germination Characteristics of Photoblastic Weedy Rice (Oryza sativa L.) Seed”
Claim · model-written summary
Phytochrome control of photoblastic weedy rice seed germination was supported by red/far-red reversibility.
- Taxon
- Oryza sativa L.Oryza sativat0
- Outcome
- weedy rice seed germinatione1
- Qualifier
- Phytochrome controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Phytochrome control of the photoblastic weedy rice seed germination was confirmed by R/FR reversibility”
t0“Germination Characteristics of Photoblastic Weedy Rice (Oryza sativa L.) Seed”
The same questions in other papers
light · growth · Oryza sativa (rice)Positive and negative results
39 papers in the same direction as this paper · 55 reporting no difference from an alternative
- positive
- positive
- positive
91 papers more in this group
See all 95 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.