Historical Changes in Grain Yield and Photosynthetic Rate of Rice Cultivars Released in the 20th Century in Tohoku Region

Zhang, Wen Hui; Kokubun, Makie

doi:10.1626/pps.7.36

Cited by 43 publications

(29 citation statements)

References 11 publications

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“…1). High yielding improved cultivars had greater sustainability of photosynthesis than in the traditional low yielding cultivar (Sasaki and Ishii 1992;Zhang and Kokubun 2004). Yielding ability of rainfed lowland rice cultivars depends on different yield attributes like panicle number, 1000-grain weight, number of ear bearing tillers and fertile spikelet numbers (Sarkar and Das 2003;).…”

Section: Discussionmentioning

confidence: 99%

“…The grain-filling period of photosensitive cultivars generally go together with gradual decline of temperature and increment of cloud free sunny weather. So far many studies have been conducted on natural leaf senescence in rice mainly with photo-insensitive Indica and Japonica rice cultivars (Wada et al 1993;Zhang and Kokubun 2004;Zhang et al 2006;Falqueto et al 2009), however, studies on natural leaf senescence with photosensitive Indica rice cultivars are inadequate. The present study elucidates the difference of the response of photosynthesis and antioxidant enzymes activities during the grain-filling period in the flag leaves among four rice cultivars which differ in grain produce capacity.…”

Section: Introductionmentioning

confidence: 99%

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Natural leaf senescence: probed by chlorophyll fluorescence, CO2 photosynthetic rate and antioxidant enzyme activities during grain filling in different rice cultivars

Panda

Sarkar

2012

Physiol Mol Biol Plants

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Natural leaf senescence was investigated in four rainfed lowland rice cultivars, FR 13A (tolerant to submergence), Sabita and Sarala (adapted to medium depth, 0-50 cm stagnant flooding) and Dengi (conventional farmers' cultivar). Changes in the levels of pigment content, CO 2 photosynthetic rate, photosystem II photochemistry and anti-oxidant enzyme activities of flag leaves during grain-filling stage were investigated. Chlorophyll content, photochemical efficiency of photosystem II and CO 2 photosynthetic rate decreased significantly with the progress of grain-filling. Likely, the activities of antioxidant enzymes namely, superoxide dismutase, catalase, guaiacol peroxidase and ascorbate peroxidase decreased with progress of grain-filling. A substantial difference was observed among the four cultivars for the sustainability index (SI) of different photosynthetic parameters and antioxidant enzyme activities; SIs of those parameters, in general, were lower in low yielding cultivar FR 13A compared to the other three cultivars. Among the four cultivars Sabita gave maximum grain yield. Yet, SI of Pn was greater in Sarala and Dengi compared to the Sabita. SIs of electron transport (ETo/CS), maximal photochemical efficiency (Fv/Fm), area above Fo and Fm, catalase and ascorbate peroxidase were also greater in Sarala and Dengi. The data showed that among the different Chl a fluorescence parameters, PI could be used with greater accuracy to distinguish slow and fast senescence rice cultivars during grain-filling period. It was concluded that maintaining the vitality of rice plants during grainfilling gave guarantee to synthesize carbohydrate, however greater yield could be realized provided superior yield attributing parameters are present.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Natural leaf senescence: probed by chlorophyll fluorescence, CO2 photosynthetic rate and antioxidant enzyme activities during grain filling in different rice cultivars

Panda

Sarkar

2012

Physiol Mol Biol Plants

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“…The improvement of leaf photosynthesis is one of the fundamental steps in increasing the yield of rice. Several researchers reported that a series of rice cultivars released in Japan over a 100-year period showed yield improvements, and concluded the photosynthetic improvements of flag leaves could be seen two to three weeks after heading (Sasaki and Ishii, 1992 ;Zhang and Kokubun, 2004). From previous fi ndings, it may be predicted that improvements of fl ag leaf photosynthesis help increase the future grain yield potential.…”

mentioning

confidence: 99%

Correlation of Chlorophyll Meter Readings with Gas exchange and Chlorophyll Fluorescence in Flag Leaves of Rice (Oryza sativaL.) Plants

Kumagai

Araki

Kubota

2009

Plant Production Science

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fax +81-92-642-2833). Abbreviations : Chl, chlorophyll; F o , initial Chl fl uorescence of a dark-adapted leaf; F m , the maximum Chl fl uorescence of a darkadapted leaf; F v , variable Chl fl uorescence; N, nitrogen; NPT, new plant type; P G , gross photosynthetic rate; PPFD, photosynthetic photon fl ux density; PSII, photosystem II; Rubisco, ribulose-1,5-bisphosphate carboxylase/oxygenase. Abstract : The objective of this study was to establish the correlation of the chlorophyll meter (SPAD) readings with the contents of chlorophyll (Chl) and ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), the gross photosynthetic rate (P G ), and the maximum quantum yield of photosystem II (PSII) (F v /F m ) in fl ag leaves of rice (Oryza sativa L.) in ripening stage. The SPAD readings signifi cantly correlated with the Chl content, the Rubisco content, P G and F v /F m (R 2 = 0.848, 0.648, 0.671 and 0.712, respectively), which suggests that the SPAD meter has the potential to estimate the photosynthetic capacity of the fl ag leaves. However, both P G and F v /F m had a stronger relationship with the Rubisco content than the SPAD readings, indicating that the PSII photochemical and CO 2 assimilation capacities are strongly infl uenced by the Rubisco content. Therefore, accurate calibration would be indispensable to obtain the physiological information from the SPAD readings of fl ag leaves. Correlation of Chlorophyll Meter

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“…Since the high leaf nitrogen concentration is positively correlated to high photosynthetic activity (Ishihara et al, 1979a(Ishihara et al, , 1979bOokawa et al, 2003;Zhang and Kokubun, 2004), the favorable effects of deep-fl ooding irrigation on grain quality may be at least partially attributable to the promotion of photosynthetic activity under high temperature conditions. However, there have been no studies showing clearly the high photosynthetic activity for the plants grown with deep-fl ooding irrigation.…”

mentioning

confidence: 99%

Reduction of Rice Chalky Grain by Deep and Permanent Irrigation Method; Effect on Growth and Grain Quality of Rice

Hayashi

Sugiura²,

Kuno³

et al. 2011

Plant Production Science

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Historical Changes in Grain Yield and Photosynthetic Rate of Rice Cultivars Released in the 20th Century in Tohoku Region

Cited by 43 publications

References 11 publications

Natural leaf senescence: probed by chlorophyll fluorescence, CO2 photosynthetic rate and antioxidant enzyme activities during grain filling in different rice cultivars

Natural leaf senescence: probed by chlorophyll fluorescence, CO2 photosynthetic rate and antioxidant enzyme activities during grain filling in different rice cultivars

Correlation of Chlorophyll Meter Readings with Gas exchange and Chlorophyll Fluorescence in Flag Leaves of Rice (Oryza sativaL.) Plants

Reduction of Rice Chalky Grain by Deep and Permanent Irrigation Method; Effect on Growth and Grain Quality of Rice

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