Abstract
In order to probe the illumination-requirement law of raising rice seedlings and promote the factory production of raising rice seedlings,two rice cultivars(Hefeng and Huangxiu)were used to study the effect of red and blue illumination from light emitting diode(LED)on the quality of seedlings.The results showed that seedlings growth was affected by LED red or blue illumination treatment,leading to the decreased quality of seedlings compared with CK(conventional fluorescent light).Total content of photosynthetic pigments decreased more under long-time LED blue illumination than under LED red illumination,while the contents of chlorophyll a and carotenoid maintained a higher level in treatment of LED red illumination.Further study showed that blue illumination treatment inhibited the root elongation,root length and plant height of rice seedlings,but increased the root number,stem thickness and dry matter accumulation,so the sound seedling index was superior to that of red illumination treatment.It implied that LED monochrome blue or red illumination would not meet the illumination requirement in factory production of raising rice seedlings.
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Claims 7
Claim · model-written summary
Red or blue LED illumination lowered seedling quality relative to conventional fluorescent light.
Verbatim
e0“seedlings growth was affected by LED red or blue illumination treatment,leading to the decreased quality of seedlings compared with CK(conventional fluorescent light)”
Claim · model-written summary
Long blue LED exposure lowered total photosynthetic pigments more than red LED exposure.
- Taxon
- Rice
Oryza sativat0 - Treatment
- long-time LED blue illuminatione0
- Outcome
- Total content of photosynthetic pigmentse0
- Direction
- decreased moree0
- Comparator
- LED red illuminatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e0“Total content of photosynthetic pigments decreased more under long-time LED blue illumination than under LED red illumination”
Claim · model-written summary
Red LED exposure maintained higher chlorophyll a and carotenoid contents.
- Taxon
- RiceOryza sativat0
- Treatment
- LED red illuminatione0
- Outcome
- contents of chlorophyll a and carotenoide0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e0“the contents of chlorophyll a and carotenoid maintained a higher level in treatment of LED red illumination”
Claim · model-written summary
Blue light inhibited root elongation, root length and plant height.
- Taxon
- riceOryza sativae0
- Treatment
- blue illumination treatmente0
- Outcome
- root elongation,root length and plant heighte0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“blue illumination treatment inhibited the root elongation,root length and plant height of rice seedlings”
Claim · model-written summary
Blue light increased root number, stem thickness and dry matter accumulation.
- Taxon
- riceOryza sativae0
- Treatment
- blue illumination treatmente0
- Outcome
- root number,stem thickness and dry matter accumulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“blue illumination treatment inhibited the root elongation,root length and plant height of rice seedlings,but increased the root number,stem thickness and dry matter accumulation”
Claim · model-written summary
Blue light produced a better sound seedling index than red light.
- Taxon
- RiceOryza sativat0
- Treatment
- blue illumination treatmente1
- Outcome
- sound seedling indexe0
- Direction
- superiore0
- Comparator
- red illumination treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e0“the sound seedling index was superior to that of red illumination treatment”
e1“blue illumination treatment inhibited the root elongation”
Claim · model-written summary
The authors concluded monochrome red or blue LEDs would not meet light needs for factory rice seedling production.
- Taxon
- riceOryza sativae0
- Outcome
- would not meet the illumination requirement in factory production of raising rice seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LED monochrome blue or red illumination would not meet the illumination requirement in factory production of raising rice seedlings”
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