Abstract
Salinity tolerance at the seedling stage of rice (Oryza sativa L.) is related to the ability to maintain photosynthesis under salinity. Sensitivity of photosynthesis to sodium accumulation in leaf blade was evaluated in 13 rice varieties differing in salinity tolerance at the seedling stage. Leaf blades were excised at the leaf base, the cut end immersed in 50 mM sodium chloride solution, and the rates of photosynthesis and transpiration were measured. Photosynthetic rate decreased in parallel to stomatal closure until leaf sodium content reached 3 to 5 mg g -1. However, in the leaves with sodium content of over 3 to 5 mg g -1, the transpiration rate was even, while photosynthetic rate decreased further due to another factor related to sodium accumulation in the leaf blade. Vulnerability of photosynthesis to sodium accumulation measured using excised leaves varied with the variety, similarly to that measured using the leaves of intact plants. These results indicated that salinity tolerance at the seedling stage in rice could be evaluated by measuring photosynthetic rate in excised leaf blades.
| Original language | English |
|---|---|
| Pages (from-to) | 78-83 |
| Number of pages | 6 |
| Journal | Japanese Journal of Crop Science |
| Volume | 70 |
| Issue number | 1 |
| Publication status | Published - 2001 |
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Keywords
- Excised leaf
- Photosynthesis
- Rice (Oryza sativa L.)
- Salinity tolerance
- Sodium
- Stomatal closure
- Transpiration
- Varietal difference
ASJC Scopus subject areas
- Agronomy and Crop Science
Cite this
Evaluation of salinity tolerance in rice : Photosynthesis of excised leaves in relation to sodium accumulation. / Makihara, Daigo; Hirai, Yoshihiko; Tsuda, Makoto; Okamoto, Kenji.
In: Japanese Journal of Crop Science, Vol. 70, No. 1, 2001, p. 78-83.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Evaluation of salinity tolerance in rice
T2 - Photosynthesis of excised leaves in relation to sodium accumulation
AU - Makihara, Daigo
AU - Hirai, Yoshihiko
AU - Tsuda, Makoto
AU - Okamoto, Kenji
PY - 2001
Y1 - 2001
N2 - Salinity tolerance at the seedling stage of rice (Oryza sativa L.) is related to the ability to maintain photosynthesis under salinity. Sensitivity of photosynthesis to sodium accumulation in leaf blade was evaluated in 13 rice varieties differing in salinity tolerance at the seedling stage. Leaf blades were excised at the leaf base, the cut end immersed in 50 mM sodium chloride solution, and the rates of photosynthesis and transpiration were measured. Photosynthetic rate decreased in parallel to stomatal closure until leaf sodium content reached 3 to 5 mg g -1. However, in the leaves with sodium content of over 3 to 5 mg g -1, the transpiration rate was even, while photosynthetic rate decreased further due to another factor related to sodium accumulation in the leaf blade. Vulnerability of photosynthesis to sodium accumulation measured using excised leaves varied with the variety, similarly to that measured using the leaves of intact plants. These results indicated that salinity tolerance at the seedling stage in rice could be evaluated by measuring photosynthetic rate in excised leaf blades.
AB - Salinity tolerance at the seedling stage of rice (Oryza sativa L.) is related to the ability to maintain photosynthesis under salinity. Sensitivity of photosynthesis to sodium accumulation in leaf blade was evaluated in 13 rice varieties differing in salinity tolerance at the seedling stage. Leaf blades were excised at the leaf base, the cut end immersed in 50 mM sodium chloride solution, and the rates of photosynthesis and transpiration were measured. Photosynthetic rate decreased in parallel to stomatal closure until leaf sodium content reached 3 to 5 mg g -1. However, in the leaves with sodium content of over 3 to 5 mg g -1, the transpiration rate was even, while photosynthetic rate decreased further due to another factor related to sodium accumulation in the leaf blade. Vulnerability of photosynthesis to sodium accumulation measured using excised leaves varied with the variety, similarly to that measured using the leaves of intact plants. These results indicated that salinity tolerance at the seedling stage in rice could be evaluated by measuring photosynthetic rate in excised leaf blades.
KW - Excised leaf
KW - Photosynthesis
KW - Rice (Oryza sativa L.)
KW - Salinity tolerance
KW - Sodium
KW - Stomatal closure
KW - Transpiration
KW - Varietal difference
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UR - http://www.scopus.com/inward/citedby.url?scp=0035081445&partnerID=8YFLogxK
M3 - Article
VL - 70
SP - 78
EP - 83
JO - Japanese Journal of Crop Science
JF - Japanese Journal of Crop Science
SN - 1349-0990
IS - 1
ER -