Variation in leaf photosynthetic characteristics in wild rice species

Kiran, T. Vishnu; Rao, Yanghui; Subrahmanyam, D.; Rani, N. Shobha; Bhadana, Vijai Pal; Rao, P. Raghuveer; Voleti, S. R.

doi:10.1007/s11099-013-0032-3

Cited by 32 publications

(36 citation statements)

References 11 publications

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“…A total of twenty wild rice accessions (Table 1) belonging to six wild spp., two each of Hybrids (DRRH3 and PA 6444) and varieties (AK-Dhan and Varadhan) and a land race (Moroberekan) were grown as described recently from this laboratory (Kiran et al 2013).…”

Section: Methodsmentioning

confidence: 99%

“…The current results were in harmony with the reports of Yeo et al (1994) that wild Oryza species had higher photosynthesis than cultivated Oryza sativa. Earlier, Kiran et al (2013) reported using photosynthetic measurements in wild accessions, O. nivara (CR 100097), O. rufipogon (CR 100267), and O. nivara (CR 100008) were superior and useful for breeding purpose (Kiran et al 2013). However, Cook and Evans (1983) reported higher photosynthetic rates in cultivated rice.…”

Section: Respiration and Light Induced Respiration Ratesmentioning

confidence: 99%

“…For instance, it is known that, for every 1.0°C increase in temperature two fold increase in respiratory activity results in lower biomass production due to burning of the reserve carbohydrates (Millow et al 2011) and is associated with mitochondrial enzyme activity (Leakay et al 2009). Assessing photosynthetic mechanisms in wild rice spp., of diverse genetic bases (Yeo et al 1994;Kiran et al 2013) and diversity in the growing environment of the cultivated rice crop (Zhao et al 2010) might provide insights of various adaptation mechanisms that were lost during breeding for developing cultivable varieties which is of importance to the plant breeders. Conversely, Ziska et al (2014) had shown that inclusion of wild rice lines may bring variation and assist in the selections for superior physiological traits.…”

Section: Introductionmentioning

confidence: 99%

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Gas exchange, carbon balance and stomatal traits in wild and cultivated rice (Oryza sativa L.) genotypes

et al. 2016

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Carbon balancing within the plant species is an important feature for climatic adaptability. Photosynthesis and respiration traits are directly linked with carbon balance. These features were studied in 20 wild rice accessions Oryza spp., and cultivars. Wide variation was observed within the wild rice accessions for photosynthetic oxygen evolution or photosynthetic rate (A), dark (R d ), and light induced respiration (LIR) rates, as well as stomatal density and number. The mean rate of A varied from 10.49 lmol O 2 m -2 s -1 in cultivated species and 13.09 lmol O 2 m -2 s -1 in wild spp., The mean R d is 2.09 lmol O 2 m -2 s -1 and 2.31 lmol O 2 m -2 s -1 in cultivated and wild spp., respectively. Light induced Respiration (LIR) was found to be almost twice in wild rice spp., (16.75 lmol O 2 m -2 s -1 ) compared to cultivated Oryza spp., Among the various parameters, this study reveals LIR and A as the key factors for positive carbon balance. Stomatal contribution towards carbon balance appears to be more dependent on abaxial surface where several number of stomata are situated. Correlation analysis indicates that R d and LIR increase with the increase in A. In this study, O. nivara (CR 100100, CR 100097), O. rufipogon (IR 103404) and O. glumaepatula (IR104387) were identified as potential donors which could be used in rice breeding program. Coordination between gas exchange and patchiness in stomatal behaviour appears to be important for carbon balance and environmental adaptation of wild rice accessions, therefore, survival under harsh environment.

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Section: Methodsmentioning

confidence: 99%

Section: Respiration and Light Induced Respiration Ratesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gas exchange, carbon balance and stomatal traits in wild and cultivated rice (Oryza sativa L.) genotypes

et al. 2016

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“…Total chlorophyll content (TCC) were measured in 80% acetone following the procedure described by Kiran et al . (2013).…”

Section: Methodsmentioning

confidence: 99%

High photosynthesis rate in the selected wild rice is driven by leaf anatomy mediating high Rubisco activity and electron transport rate

Mathan

Singh

Jathar

et al. 2019

Preprint

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10The importance of increasing photosynthetic efficiency for sustainable crop yield 11 increases to feed the growing world population is well recognized. The natural genetic 12 variation for leaf photosynthesis in crop plants is an overlooked and untapped resource. The 13 genus Oryza, including cultivated rice and wild relatives, offers tremendous genetic 14 variability to explore photosynthetic differences, and underlying developmental, 15 photochemical, and biochemical basis. We quantified leaf photosynthesis and related 16 physiological parameters for ten cultivated and wild rice genotypes to identify 17 photosynthetically efficient wild rice species. Wild rice species with high leaf photosynthesis 18 per unit area had striking anatomical features, such as larger mesophyll cells with more 19 chloroplasts, larger and closer veins, and a smaller number of mesophyll cells between two 20 consecutive veins. In addition, photosynthetically efficient wild rice species showed an 21 efficient Photosystem II as well as higher carboxylation activity of Rubisco compared to less 22 efficient cultivated varieties, such as IR 64. Our results show the existence of desirable 23 variations in mesophyll and vein features, Photosystem II efficiency, and Rubisco activity in 24 the rice system itself that could possibly be targeted for higher leaf photosynthesis. Detailed 25 genetic and molecular understanding of these traits shall be instrumental in increasing 26 photosynthetic efficiency of cultivated rice. 27 28

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“…However, the photosynthetic characteristics of 'Chaling' CWR under cold stress remain unknown. There are a few research reports on the photosynthesis of CWR, but these studies were only focused on their photosynthetic characteristics under the optimum temperature condition (Kang et al, 2007;Kiran et al, 2013;Masumoto et al, 2004;Yeo et al, 1994;Zhao et al, 2008;Zhao et al, 2010). Although the cold stress tolerance property of 'Chaling' CWR is well known, its photosynthetic ability under cold stress is little known.…”

Section: Aqy and Ce Measurementsmentioning

confidence: 99%

The Photosynthetic Characteristics in Chaling Common Wild Rice (Oryza rufipogon Griff.) under the Cold Stress

2016

Not Bot Horti Agrobo

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Abstract'Chaling' common wild rice (CWR, Oryza rufipogon Griff.), found in Chaling county, Hunan province, China, is one of the only two wild rice populations grown northernmost in the world. Although the cold tolerance of 'Chaling' CWR is extremely strong, its photosynthetic characteristics under cold stress remain unknown. In this study, the photosynthetic parameters of leaves at tiller stage in 'Chaling' CWR were first determined under the conditions of cold stress (15 °C) and normal temperature (28 °C), and then compared with those in the standard rice cultivars including indica 'Guangluai 4', indica 'Y-Liangyou 1' (a Chinese hybrid rice with super high grain yield), and japonica 'Nipponbare' under the same temperature conditions. The results showed that the net photosynthetic rate, the total chlorophyll and total carotenoid contents, the maximum quantum yield of PSII, the apparent quantum yield, and the carboxylation efficiency in 'Chaling' CWR were all significantly higher than those in the standard rice cultivars under cold stress (P < 0.05). The ratios of these parameters in 'Chaling' CWR under cold stress to those under normal temperature condition were 47.9 ~ 84.9%, much higher than those in the standard rice cultivars, which were 3.1 ~ 73.8%. These results indicate that the photosynthetic characteristics of 'Chaling' CWR under cold stress are excellent. Our findings would have an enormous benefit if the trait of the cold stress tolerance of 'Chaling' CWR is transferred to the cultivated rice via the traditional breeding or molecular breeding.Keywords: apparent quantum yield, carboxylation efficiency, chlorophyll fluorescence, photosynthetic pigment, photosynthetic rate Abbreviations: A-C i curve -assimilation rate plotted against intercellular CO 2 concentration, AQY -apparent quantum yield, Car -carotenoids, CE -carboxylation efficiency, Chl -chlorophyll, CWR -common wild rice, F o -the minimal chlorophyll fluorescence value, F m -the maximum chlorophyll fluorescence value, F v /F m -variable to maximum fluorescence, P n -net photosynthetic rate.

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Variation in leaf photosynthetic characteristics in wild rice species

Cited by 32 publications

References 11 publications

Gas exchange, carbon balance and stomatal traits in wild and cultivated rice (Oryza sativa L.) genotypes

Gas exchange, carbon balance and stomatal traits in wild and cultivated rice (Oryza sativa L.) genotypes

High photosynthesis rate in the selected wild rice is driven by leaf anatomy mediating high Rubisco activity and electron transport rate

The Photosynthetic Characteristics in Chaling Common Wild Rice (Oryza rufipogon Griff.) under the Cold Stress

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