Photosynthetic acclimation to elevated CO2 is dependent on N partitioning and transpiration in soybean

Kanemoto, Kenji; Yamashita, Yumiko; Ozawa, Tomoko; Imanishi, Naomi; Nguyen, Nguyen Tran; Suwa, Rempei; Mohapatra, Pravat K.; Kanai, Syunsuke; Moghaieb, Reda E. A.; Ito, Junki; El‐Shemy, Hany A.; Fujita, Kazuo

doi:10.1016/j.plantsci.2009.06.017

Cited by 24 publications

(22 citation statements)

References 39 publications

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“…Additionally, a common response of plants to elevated CO 2 concentration is reduced stomatal conductance (Leakey et al 2009a). This frequently results in a reduced transpiration rate, coupled to a resultant increase in the plant's water use efficiency (Radoglou et al 1992, Kanemoto et al 2009.…”

Section: Introductionmentioning

confidence: 99%

Effects of elevated CO₂concentration and increased temperature on leaf related-physiological responses of Phytolacca insularis (native species) and Phytolacca americana (invasive species)

Kim¹,

You²

2010

J. Ecol. Environ.

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In the study, the effects of elevated CO 2 and temperature on the photosynthetic characteristics, chlorophyll content, nitrogen content, carbon content, and C/N ratio of Phytolacca insularis and Phytolacca americana were examined under control (ambient CO 2 + ambient temperature) and treatment (elevated CO 2 + elevated temperature) for 2 years (2008 and 2009). The photosynthetic rate, transpiration rate and water use efficiency of two plant species were higher under the treatment than the under the control. The stomatal conductance of P. insularis was higher under the control, but that of P. americana was not significantly affected by CO 2 and temperature under the treatment. The chlorophyll contents of two species were decreased about 72.5% and 20%, respectively, by elevated CO 2 and temperature. The nitrogen contents of two species were not significantly altered by increase in CO 2 and temperature. The carbon contents of the two species were higher under the treatment than under the control. The C/N ratio of P. insularis was higher under the treatment but that of P. americana was not significantly affected by CO 2 and temperature. These results demonstrated that the physiological responses of P. insularis native plants might be more sensitively influenced by a CO 2-mediated global warming situation than those of the P. americana invasive plants.

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Section: Introductionmentioning

confidence: 99%

Effects of elevated CO₂concentration and increased temperature on leaf related-physiological responses of Phytolacca insularis (native species) and Phytolacca americana (invasive species)

Kim¹,

You²

2010

J. Ecol. Environ.

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“…Several studies on C 3 plants suggest that the stomatal conductance and transpiration greatly contribute to the rate of N transport to leaves (Kanemoto et al 2009). The decrease in transpiration observed at elevated levels of CO 2 was the main cause of the down-regulation of the rate of N partitioning (Kanemoto et al 2009). Certain authors, however, have found evidence that the nutrient flux within C 4 plants is uncoupled from transpiration (Tanner and Beevers 2001).…”

Section: Elevated Co 2 Increases New N Retention In Roots and N Supplmentioning

confidence: 99%

Increased sink capacity enhances C and N assimilation under drought and elevated CO2 conditions in maize

Zong

2016

Journal of Integrative Agriculture

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The maintenance of rapid growth under conditions of CO 2 enrichment is directly related to the capacity of new leaves to use or store the additional assimilated carbon (C) and nitrogen (N). Under drought conditions, however, less is known about C and N transport in C 4 plants and the contributions of these processes to new foliar growth. We measured the patterns of C and N accumulation in maize (Zea mays L.) seedlings using 13 C and 15 N as tracers in CO 2 climate chambers (380 or 750 µmol mol-1) under a mild drought stress induced with 10% PEG-6000. The drought stress under ambient conditions decreased the biomass production of the maize plants; however, this effect was reduced under elevated CO 2. Compared with the water-stressed maize plants under atmospheric CO 2 , the treatment that combined elevated CO 2 with water stress increased the accumulation of biomass, partitioned more C and N to new leaves as well as enhanced the carbon resource in ageing leaves and the carbon pool in new leaves. However, the C counterflow capability of the roots decreased. The elevated CO 2 increased the time needed for newly acquired N to be present in the roots and increased the proportion of new N in the leaves. The maize plants supported the development of new leaves at elevated CO 2 by altering the transport and remobilization of C and N. Under drought conditions, the increased activity of new leaves in relation to the storage of C and N sustained the enhanced growth of these plants under elevated CO 2 .

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“…The decrease in stomatal conductance and transpiration with lumichrome supply to maize, soybean and Bambara groundnut closely mirrors the reduced stomatal conductance and leaf transpiration rates caused by elevated CO 2 in C3 plant species (40.5 and 3.6%, respectively, in soybean; see Madhu and Hatfield, 2014 ). In one study, the decrease in stomatal conductance and transpiration rates with elevated CO 2 led to reduced mineral 15 N uptake ( Kanemoto et al, 2009 ), just as the reduced stomatal conductance, and hence lower transpirational pull in test legumes exposed to elevated CO 2 also resulted in significantly decreased uptake of Mg, Fe, Cu, and B ( Duval et al, 2012 ). In contrast, where there was an increase in stomatal conductance and leaf transpiration, mineral nutrient uptake was also increased in roots.…”

Section: Is Mineral Nutrition In Nodulated Legumes Controlled By Multmentioning

confidence: 99%

Rhizosphere ecology of lumichrome and riboflavin, two bacterial signal molecules eliciting developmental changes in plants

2015

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Lumichrome and riboflavin are novel molecules from rhizobial exudates that stimulate plant growth. Reported studies have revealed major developmental changes elicited by lumichrome at very low nanomolar concentrations (5 nM) in plants, which include early initiation of trifoliate leaves, expansion of unifoliate and trifoliate leaves, increased stem elongation and leaf area, and consequently greater biomass accumulation in monocots and dicots. But higher lumichrome concentration (50 nM) depressed root development and reduced growth of unifoliate and second trifoliate leaves. While the mechanisms remain unknown, it is possible that lumichrome released by rhizobia induced the biosynthesis of classical phytohormones that caused the observed developmental changes in plants. We also showed in earlier studies that applying either 10 nM lumichrome, 10 nM ABA, or 10 ml of infective rhizobial cells (0.2 OD600) to roots of monocots and dicots for 44 h produced identical effects, which included decreased stomatal conductance and leaf transpiration in Bambara groundnut, soybean, and maize, increased stomatal conductance and transpiration in cowpea and lupin, and elevated root respiration in maize (19% by rhizobia and 20% by lumichrome). Greater extracellular exudation of lumichrome, riboflavin and indole acetic acid by N2-fixing rhizobia over non-fixing bacteria is perceived to be an indication of their role as symbiotic signals. This is evidenced by the increased concentration of lumichrome and riboflavin in the xylem sap of cowpea and soybean plants inoculated with infective rhizobia. In fact, greater xylem concentration of lumichrome in soybean and its correspondingly increased accumulation in leaves was found to result in dramatic developmental changes than in cowpea. Furthermore, lumichrome and riboflavin secreted by soil rhizobia are also known to function as (i) ecological cues for sensing environmental stress, (ii) growth factors for microbes, plants, and humans, (iii) signals for stomatal functioning in land plants, and (iv) protectants/elicitors of plant defense. The fact that exogenous application of ABA to plant roots caused the same effect as lumichrome on leaf stomatal functioning suggests molecular cross-talk in plant response to environmental stimuli.

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Photosynthetic acclimation to elevated CO2 is dependent on N partitioning and transpiration in soybean

Cited by 24 publications

References 39 publications

Effects of elevated CO₂concentration and increased temperature on leaf related-physiological responses of Phytolacca insularis (native species) and Phytolacca americana (invasive species)

Effects of elevated CO₂concentration and increased temperature on leaf related-physiological responses of Phytolacca insularis (native species) and Phytolacca americana (invasive species)

Increased sink capacity enhances C and N assimilation under drought and elevated CO2 conditions in maize

Rhizosphere ecology of lumichrome and riboflavin, two bacterial signal molecules eliciting developmental changes in plants

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Photosynthetic acclimation to elevated CO2 is dependent on N partitioning and transpiration in soybean

Cited by 24 publications

References 39 publications

Effects of elevated CO2concentration and increased temperature on leaf related-physiological responses of Phytolacca insularis (native species) and Phytolacca americana (invasive species)

Effects of elevated CO2concentration and increased temperature on leaf related-physiological responses of Phytolacca insularis (native species) and Phytolacca americana (invasive species)

Increased sink capacity enhances C and N assimilation under drought and elevated CO2 conditions in maize

Rhizosphere ecology of lumichrome and riboflavin, two bacterial signal molecules eliciting developmental changes in plants

Contact Info

Product

Resources

About

Effects of elevated CO₂concentration and increased temperature on leaf related-physiological responses of Phytolacca insularis (native species) and Phytolacca americana (invasive species)

Effects of elevated CO₂concentration and increased temperature on leaf related-physiological responses of Phytolacca insularis (native species) and Phytolacca americana (invasive species)