Abstract
Kermode, A. R. and Bewley, J. D. 1985. The role of maturation drying in the transition from seed development to germination. 1. Acquisition of desiccation–tolerance and germinability during development of Ricinus communis L. seeds.—J. exp. Bot. 36: 1906–1915. Seeds of Ricinus communis L. cv. Hale (castor bean) undergo a transition from desiccation–intolerance to desiccation–tolerance approximately midway through their development. Tolerance of slow desiccation is gained over only a few days of development (between 20 and 25 d) and is achieved well before the completion of major developmental events, such as reserve deposition and the onset of normal maturation drying. A tolerance of very rapid water loss brought about by drying over silica gel is not acquired by this seed until near maturity. Coincident with the acquisition of tolerance to slow desiccation the seeds gain the capacity to germinate upon subsequent rehydration. Germinability and capacity for normal post–germinative growth during the tolerant phase are not fully expressed unless the seed is dried at an optimal rate, which is dependent upon the developmental stage of the seed. Drying presumably acts to terminate developmental processes and to initiate those metabolic processes necessary to prepare the seed for germination and growth.
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Claims 7
Claim · model-written summary
Ricinus communis seeds transition from desiccation intolerance to tolerance about midway through development.
- Taxon
- Ricinus communis L.
Ricinus communise0 - Material
- cv. Halee0
- Organ / stage
- Seedse0
- Outcome
- transition from desiccation–intolerance to desiccation–tolerancee0
- Qualifier
- approximately midway through their developmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of Ricinus communis L. cv. Hale (castor bean) undergo a transition from desiccation–intolerance to desiccation–tolerance approximately midway through their development.”
Claim · model-written summary
Tolerance of slow desiccation is acquired between developmental days 20 and 25.
- Taxon
- Ricinus communis L.Ricinus communise6
- Outcome
- Tolerance of slow desiccatione0
- Direction
- gainede0
- Value
- between 20 and 25 de0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tolerance of slow desiccation is gained over only a few days of development (between 20 and 25 d) and is achieved well before the completion of major developmental events, such as reserve deposition and the onset of normal maturation drying.”
e6“Seeds of Ricinus communis L. cv. Hale (castor bean)”
Claim · model-written summary
Slow desiccation tolerance develops before reserve deposition and normal maturation drying are complete.
- Taxon
- Ricinus communis L.Ricinus communise6
- Outcome
- Tolerance of slow desiccatione0
- Qualifier
- well before the completion of major developmental events, such as reserve deposition and the onset of normal maturation dryinge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tolerance of slow desiccation is gained over only a few days of development (between 20 and 25 d) and is achieved well before the completion of major developmental events, such as reserve deposition and the onset of normal maturation drying.”
e6“Seeds of Ricinus communis L. cv. Hale (castor bean)”
Claim · model-written summary
Tolerance of rapid water loss from silica gel drying is acquired only near maturity.
- Taxon
- Ricinus communis L.Ricinus communise6
- Treatment
- drying over silica gele0
- Outcome
- tolerance of very rapid water losse0
- Qualifier
- near maturitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A tolerance of very rapid water loss brought about by drying over silica gel is not acquired by this seed until near maturity.”
e6“Seeds of Ricinus communis L. cv. Hale (castor bean)”
Claim · model-written summary
Seeds gain capacity to germinate on rehydration when they become tolerant of slow desiccation.
- Taxon
- Ricinus communis L.Ricinus communise6
- Outcome
- capacity to germinate upon subsequent rehydratione0
- Qualifier
- Coincident with the acquisition of tolerance to slow desiccatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coincident with the acquisition of tolerance to slow desiccation the seeds gain the capacity to germinate upon subsequent rehydration.”
e6“Seeds of Ricinus communis L. cv. Hale (castor bean)”
Claim · model-written summary
Germinability and normal post-germinative growth require a drying rate suited to developmental stage for full expression.
- Taxon
- Ricinus communis L.Ricinus communise6
- Treatment
- dried at an optimal ratee0
- Outcome
- Germinability and capacity for normal post–germinative growthe0
- Qualifier
- dependent upon the developmental stage of the seede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germinability and capacity for normal post–germinative growth during the tolerant phase are not fully expressed unless the seed is dried at an optimal rate, which is dependent upon the developmental stage of the seed.”
e6“Seeds of Ricinus communis L. cv. Hale (castor bean)”
Claim · model-written summary
The authors propose that drying terminates development and initiates metabolism needed for germination and growth.
- Taxon
- Ricinus communis L.Ricinus communise6
- Treatment
- Dryinge0
- Outcome
- prepare the seed for germination and growthe0
- Qualifier
- terminate developmental processes and to initiate those metabolic processese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drying presumably acts to terminate developmental processes and to initiate those metabolic processes necessary to prepare the seed for germination and growth.”
e6“Seeds of Ricinus communis L. cv. Hale (castor bean)”
The same questions in other papers
processing · growth · Ricinus communis (castor bean)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- positive
- negative
- negative
2 papers more in this group
See all 6 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.