Abstract
Accumulation of the pathogenesis-related (PR) proteins localised in intercellular spaces of barley primary leaves, chlorophyll content, structure of chloroplasts, and photosynthesis were examined during natural and in vitro induced leaf senescence (cultivation of whole plants in the dark or detached leaves under nutrient deficiency). Some of PR proteins accumulated during natural senescence, but their accumulation pattern was different from those of pathogen-induced as well as during in vitro-induced senescence, which indicate different molecular bases of these processes. Photosynthetic rate and chlorophyll content indicate that natural senescence of barley primary leaves began from 15th day after sowing. In 35-d-old first leaves, the chloroplasts showed typical characteristics of senescence as significant decrease of size, greater grana, and prominent plastoglobuli. The chloroplasts contained more grana under in vitro induced senescence and they had reduced length in the dark. Correspondingly, accumulation of PR proteins was detectable on about the 15th day but the content of some PR proteins increased in later stages of senescence.
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Claims 7
Claim · model-written summary
PR protein accumulation during natural senescence of barley leaves follows a different pattern from pathogen-induced and in vitro induced senescence.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- natural senescencee0
- Outcome
- accumulation patterne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“barley leaf intercellular spaces during leaf senescence”
e0“Some of PR proteins accumulated during natural senescence, but their accumulation pattern was different from those of pathogen-induced as well as during in vitro-induced senescence”
Claim · model-written summary
Natural senescence of barley primary leaves began from the 15th day after sowing, indicated by photosynthetic rate and chlorophyll content.
- Taxon
- barleyHordeum vulgaret0
- Organ / stage
- primary leavese1
- Outcome
- natural senescencee1
- Value
- 15th day after sowinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley leaf intercellular spaces during leaf senescence”
e1“Photosynthetic rate and chlorophyll content indicate that natural senescence of barley primary leaves began from 15th day after sowing”
Claim · model-written summary
In 35-day-old barley first leaves, chloroplasts showed a significant decrease of size.
- Taxon
- barleyHordeum vulgaret0
- Organ / stage
- 35-d-old first leavese2
- Outcome
- chloroplastse2
- Direction
- decreasee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley leaf intercellular spaces during leaf senescence”
e2“In 35-d-old first leaves, the chloroplasts showed typical characteristics of senescence as significant decrease of size, greater grana, and prominent plastoglobuli”
Claim · model-written summary
Chloroplasts contained more grana under in vitro induced senescence than otherwise.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- in vitro induced senescencee3
- Outcome
- granae3
- Direction
- moree3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley leaf intercellular spaces during leaf senescence”
e3“The chloroplasts contained more grana under in vitro induced senescence and they had reduced length in the dark”
Claim · model-written summary
Chloroplasts had reduced length in the dark in barley leaves undergoing in vitro induced senescence.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- in the darke3
- Outcome
- lengthe3
- Direction
- reducede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley leaf intercellular spaces during leaf senescence”
e3“The chloroplasts contained more grana under in vitro induced senescence and they had reduced length in the dark”
Claim · model-written summary
PR protein accumulation was detectable from about the 15th day of barley leaf senescence.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- accumulation of PR proteinse4
- Value
- about the 15th daye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley leaf intercellular spaces during leaf senescence”
e4“accumulation of PR proteins was detectable on about the 15th day”
Claim · model-written summary
The content of some PR proteins increased in later stages of barley leaf senescence.
- Taxon
- barleyHordeum vulgaret0
- Organ / stage
- later stages of senescencee5
- Outcome
- content of some PR proteinse5
- Direction
- increasede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley leaf intercellular spaces during leaf senescence”
e5“the content of some PR proteins increased in later stages of senescence”