High Nitrogen Use Efficiency in Rice Genotypes is Associated with Higher Net Photosynthetic Rate at Lower Rubisco Content

Ray, Debabrata; Sheshshayee, M. S.; Mukhopadhyay, K.; Bindumadhava, H.; Prasad, T. G.; Kumar, Manish

doi:10.1023/a:1022858828972

Cited by 29 publications

(14 citation statements)

References 22 publications

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“…Although useful information on the effect of heat stress on photosynthesis and photosynthesis exists for other crop plants, sparse in mungbean ( Bindumadhava et al, 2015 ). Under HTs, RuBisCO though enzymatically active, RuBisCO activase (RA) suffers catalytic deactivation, which might trigger disruption of total turnover rates of the enzyme ( Ray et al, 2003 ). Oxidative damage to leaves increases, impairing photosynthetic efficiency, which also affects nitrogen-fixing ability of mungbean rhizobia by restricting formation and spread of root hair ( Bansal et al, 2014 ).…”

Section: High Temperaturementioning

confidence: 99%

Salinity and High Temperature Tolerance in Mungbean [Vigna radiata (L.) Wilczek] from a Physiological Perspective

HanumanthaRao¹,

Nair²,

Nayyar

2016

Front. Plant Sci.

153

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Biotic and abiotic constraints seriously affect the productivity of agriculture worldwide. The broadly recognized benefits of legumes in cropping systems—biological nitrogen fixation, improving soil fertility and broadening cereal-based agro-ecologies, are desirable now more than ever. Legume production is affected by hostile environments, especially soil salinity and high temperatures (HTs). Among legumes, mungbean has acceptable intrinsic tolerance mechanisms, but many agro-physiological characteristics of the Vigna species remain to be explored. Mungbean has a distinct advantage of being short-duration and can grow in wide range of soils and environments (as mono or relay legume). This review focuses on salinity and HT stresses on mungbean grown as a fallow crop (mungbean-rice-wheat to replace fallow-rice-wheat) and/or a relay crop in cereal cropping systems. Salinity tolerance comprises multifaceted responses at the molecular, physiological and plant canopy levels. In HTs, adaptation of physiological and biochemical processes gradually may lead to improvement of heat tolerance in plants. At the field level, managing or manipulating cultural practices can mitigate adverse effects of salinity and HT. Greater understanding of physiological and biochemical mechanisms regulating these two stresses will contribute to an evolving profile of the genes, proteins, and metabolites responsible for mungbean survival. We focus on abiotic stresses in legumes in general and mungbean in particular, and highlight gaps that need to be bridged through future mungbean research. Recent findings largely from physiological and biochemical fronts are examined, along with a few agronomic and farm-based management strategies to mitigate stress under field conditions.

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Section: High Temperaturementioning

confidence: 99%

Salinity and High Temperature Tolerance in Mungbean [Vigna radiata (L.) Wilczek] from a Physiological Perspective

HanumanthaRao¹,

Nair²,

Nayyar

2016

Front. Plant Sci.

153

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“…However, the close correlation of Rubisco content with chloroplast volume suggested that there is no physical space for yet more of the enzyme in both C3 and C4 crops 9,10 . Furthermore, it is anticipated that increased Rubisco production could only be achieved at the expense of nitrogen use efficiency -with consequences for sustainability 11 . Recent analyses of chloroplast volume in C4 crops and a demonstrated transgenic increase in Rubisco content in maize have disproved the space limitation hypothesis for C4 crops 12,13 and, now, Yoon et al 3 disprove the hypothesis for C3 rice.…”

mentioning

confidence: 99%

Photosynthesis engineered to increase rice yield

Long¹

2020

Nat Food

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“…The band corresponding to RuBisCO protein was visually identified and transferred into an eppendorf tube containing 2 ml of formamide and the tube was incubated at 50°C for 8 h. Absorbance was measured at 595 nm (Eppendorf Bio Spectrometer basic, 230 V/50–60 Hz) using Bovine serum albumin as standard protein. The ratio of photosynthetic rate to RuBisCO content ( A /R) was computed as an estimate of in‐vivo RuBisCO efficiency (Ray et al ).…”

Section: Methodsmentioning

confidence: 99%

Leaf mass area determines water use efficiency through its influence on carbon gain in rice mutants

Reddy

Singhal

DaCosta

et al. 2020

Physiologia Plantarum

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Saving water and enhancing rice productivity are consensually the most important research goals globally. While increasing canopy cover would enhance growth rates by higher photosynthetic carbon gain, an accompanied increase in transpiration would have a negative impact on saving water as well as for sustainability under water‐limited conditions. Increased water use efficiency (WUE) by virtue of higher carbon assimilatory capacity can significantly circumvent this trade‐off. Here, we report leaf mass area (LMA) has an important canopy architecture trait which when combined with superior carboxylation efficiency (CE) would achieve higher water productivity in rice. A set of 130 ethyl methanesulfonate induced mutants of an upland cultivar Nagina‐22 (N22), was screened for leaf morphological traits leading to the identification of mutants differing in LMA. The wild‐type, N22, along with a selected low‐LMA (380–4‐3) and two high‐LMA mutants (392–9‐1 and 457–1‐3), all with comparable total leaf area, were raised under well‐watered (100% Field Capacity (FC)) and water‐limited (60% FC) conditions. Low Δ13C and a higher RuBisCO content in high‐LMA mutants indicated higher carboxylation efficiency, leading to increased carbon gain. Single parent backcross populations developed by crossing high and the low‐LMA mutants with N22, separately, were screened for LMA, Δ13C and growth traits. Comparison of dry matter accumulation per unit leaf area among the progenies differing in LMA and Δ13C reiterated the association of LMA with CE. Results illustrated that high‐LMA when combined with higher CE (low Δ13C) lead to increased WUE and growth rates.

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High Nitrogen Use Efficiency in Rice Genotypes is Associated with Higher Net Photosynthetic Rate at Lower Rubisco Content

Cited by 29 publications

References 22 publications

Salinity and High Temperature Tolerance in Mungbean [Vigna radiata (L.) Wilczek] from a Physiological Perspective

Salinity and High Temperature Tolerance in Mungbean [Vigna radiata (L.) Wilczek] from a Physiological Perspective

Photosynthesis engineered to increase rice yield

Leaf mass area determines water use efficiency through its influence on carbon gain in rice mutants

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