Varietal Differences in Photosynthetic Rates in Rice Plants, with Special Reference to the Nitrogen Content of Leaves

Hirasawa, Tadashi; Ozawa, Satomi; Taylaran, Renante D.; Ookawa, Taiichiro

doi:10.1626/pps.13.53

Cited by 59 publications

(44 citation statements)

References 21 publications

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“…The observed differences in the relationship of gas exchange parameters are attributed to genotypes and are in good agreement with findings of Hirasawa et al, (2010) which highlights the genotypic differences in photosynthetic rate of flag leaves. Flag leaf photosynthesis revealed a good correlation with root biomass of the varieties.…”

Section: Discussionsupporting

confidence: 86%

Changes in organic carbon pool in a tropical soil planted to rice in relation to photosynthetic carbon fixation

Bharali¹,

Baruah²,

Gogoi³

2016

Aust J Crop Sci

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Information on the fate of photosynthesized carbon (C) in plant soil system is essential for understanding the soil organic carbon pool and carbon dynamics in agricultural ecosystem. Our objectives in the present study were to quantify the photosynthetic carbon fixation by high yielding rice genotypes and contribution of rice ecosystem to soil organic carbon pool in a tropical rice soil. A field experiment was conducted during 3 consecutive monsoon rice season (July -December) of 2012, 2013 and 2014 in a randomized block design (RBD). A portable photosynthesis system was used for measurement of flag leaf photosynthesis. Stomatal frequency of the flag leaves were studied by scanning electron microscopy (SEM). Soil organic carbon storage was estimated by a total organic carbon (TOC) analyzer. Differences in flag leaf photosynthetic carbon fixation amongst the varieties were significant. Differential ability for carbon partitioning in terms of biomass accumulation were also noteworthy (p = 0.000). Flag leaf photosynthetic rate observed in the study showed a good correlation (r = 0.486, p ≤ 0.05) with the stomatal frequency of the flag leaves. The leaf stomatal frequency ranged from 605 to 783 mm -2 of leaf area with a high in the rice variety, Swarnamahsuri and low in Gitesh. There were significant differences in cumulative methane (CH 4 ) emission amongst the four rice varieties. The grain productivity in retaliation to genetic differences of the rice varieties highly favored their correlations with flag leaf photosynthesis (r = 0.999, p ≤ 0.01) and leaf area index (r = 0.961, p ≤ 0.01). Above ground and below ground dry matter of the plants were found to influence the quantity of soil organic carbon and soil C storage. Our results also clearly bespoke that a rice ecosystem can effectively sequester carbon (0.338 Mg C ha -1 yr -1 ) at 0 -15cm depth of soil. The results led us to conclude that lowland rice ecosystem is a good sink of carbon dioxide (CO 2 ).

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Section: Discussionsupporting

confidence: 86%

Changes in organic carbon pool in a tropical soil planted to rice in relation to photosynthetic carbon fixation

Bharali¹,

Baruah²,

Gogoi³

2016

Aust J Crop Sci

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“…We demonstrated previously that a high-yielding indica variety, Takanari, had a higher LPR, which was due to a higher leaf nitrogen content (Xu et al, 1997;Ohsumi et al, 2008;Hirasawa et al, 2010), and therefore, to a higher Rubisco content at a given level of nitrogen application, and due to the greater stomatal conductance of each leaf at a given level of leaf nitrogen, than in common japonica varieties (Hirasawa et al, 2010). In the present study, the LPR in the highyielding indica variety, Habataki, was higher by approximately 30% to 40% than that in the japonica variety, Sasanishiki.…”

Section: Causes Of Varietal Differences In Lprmentioning

confidence: 94%

Identification of Chromosomal Regions Controlling the Leaf Photosynthetic Rate in Rice by Using a Progeny from Japonica and High-yielding Indica Varieties

Adachi

Nito

Kondo

et al. 2011

Plant Production Science

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“…LNC is closely correlated with leaf Rubisco content, and one of the most important parameters on photosynthesis (Evans, 1989;Hirasawa et al, 2010;Makino et al, 1992). There are significant varietal differences in LNC in rice cultivars even under the same N fertilizer treatment (Hirasawa et al, 2010;Kanemura et al, 2007). LNC of Shennong265 was higher than that of Nipponbare or Takanari at the same rate of N application (Table 2, 4).…”

Section: Disclosure Statementmentioning

confidence: 94%

“…Rubisco concentration is closely related to V cmax , and leaf Rubisco content is a key factor of the limitation of CO 2 assimilation (Farquhar et al, 1980). LNC is closely correlated with leaf Rubisco content, and one of the most important parameters on photosynthesis (Evans, 1989;Hirasawa et al, 2010;Makino et al, 1992). There are significant varietal differences in LNC in rice cultivars even under the same N fertilizer treatment (Hirasawa et al, 2010;Kanemura et al, 2007).…”

Section: Disclosure Statementmentioning

confidence: 99%

Response of the leaf photosynthetic rate to available nitrogen in erect panicle-type rice (Oryza sativa L.) cultivar, Shennong265

Urairi

Tanaka

Hirooka

et al. 2016

Plant Production Science

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Increasing the yield of rice per unit area is important because of the demand from the growing human population in Asia. A group of varieties called erect panicle-type rice (EP) achieves very high yields under conditions of high nitrogen availability. Little is known, however, regarding the leaf photosynthetic capacity of EP, which may be one of the physiological causes of high yield. We analyzed the factors contributing to leaf photosynthetic rate (P n ) and leaf mesophyll anatomy of Nipponbare, Takanari, and Shennong265 (a EP type rice cultivar) varieties subjected to different nitrogen treatments. In the field experiment, P n of Shennong265 was 33.8 μmol m −2 s −1 in the high-N treatment, and was higher than that of the other two cultivars because of its high leaf nitrogen content (LNC) and a large number of mesophyll cells between the small vascular bundles per unit length. In Takanari, the relatively high value of P n (31.5 μmol m −2 s ) in the high-N treatment. In the pot experiment, the ratio of P n /C i to LNC, which may reflect mesophyll conductance (g m ), was 20-30% higher in Nipponbare than in Takanari or Shennong265 in the high N availability treatment. The photosynthetic performance of Shennong265 might be improved by introducing the greater ratio of P n /C i to LNC found in Nipponbare and greater stomatal conductance found in Takanari.

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Varietal Differences in Photosynthetic Rates in Rice Plants, with Special Reference to the Nitrogen Content of Leaves

Cited by 59 publications

References 21 publications

Changes in organic carbon pool in a tropical soil planted to rice in relation to photosynthetic carbon fixation

Changes in organic carbon pool in a tropical soil planted to rice in relation to photosynthetic carbon fixation

Identification of Chromosomal Regions Controlling the Leaf Photosynthetic Rate in Rice by Using a Progeny from Japonica and High-yielding Indica Varieties

Response of the leaf photosynthetic rate to available nitrogen in erect panicle-type rice (Oryza sativa L.) cultivar, Shennong265

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