Light Intensity Effects on Growth and Micronutrient Uptake by Tropical Legume Cover Crops

Baligar, V. C.; Fageria, N. K.; Paiva, Arlicélio de Queiroz; Silveira, Adriana Parada Dias da; Pomella, A. W. V.; Machado, Rubens E. G.

doi:10.1080/01904160600927633

Cited by 36 publications

(45 citation statements)

References 14 publications

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“…At all levels of PPFD, C. breviflora and C. ochroleuca produced higher P N than the other two crotalarias, indicating that these two grow well under no shade or moderate shade. Inter-/intra specific differences in shade tolerance of tropical legumes has been widely reported [14,16,17,41,48,49]. Information is lacking on the response of crotalarias to shade in plantation crop systems.…”

Section: Ppfd Effectsmentioning

confidence: 99%

Photosynthetic Photon Flux Density, Carbon Dioxide Concentration and Temperature Influence Photosynthesis in Crotalaria Species

Baligar¹

2012

TOPSJ

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Crotalarias are tropical legumes grown as cover crops or as green manure to improve soil fertility. As an understory plant in plantation systems, these cover crops receive low levels of irradiance and are subjected to elevated levels of CO 2 and temperatures. A greenhouse experiment was conducted to evaluate the independent short-term effects of photosynthetic photon flux density (PPFD), external carbon dioxide concentration (C a) and temperature (T) on net photosynthesis (P N), internal CO 2 (C i), stomatal conductance (g s) and transpiration (E) in four Crotalaria species (C. breviflora, C. mucronata, C. ochroleuca, C. spectabilis). These crotalarias responded differently to changing PPFD, C a and T. In all the Crotalaria species, increasing PPFD from 50 to 1500 mol m-2 s-1 increased P N by 21 fold, increased g s by 2.3 fold (136%), decreased C i by 3.9 times, and increased E by 2.1 times. Increasing the external C a from 100 to 1000 cm 3 m-3 increased P N by 4.7 fold, decreased g s by 1.3 times, increased C i by 28 fold, and decreased E by 1.2 times. Increasing the T from 25 to 35 °C increased P N of Crotalaria species by 11%, decreased g s by 33%, decreased C i by 64%, and increased E by 56%. Shade management is critical to maintaining the productivity of these tropical legumes.

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Section: Ppfd Effectsmentioning

confidence: 99%

Photosynthetic Photon Flux Density, Carbon Dioxide Concentration and Temperature Influence Photosynthesis in Crotalaria Species

Baligar¹

2012

TOPSJ

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“…Baligar et al (2006) have reported that light intensity affects growth and nutrient uptake by legume cover crops. This implies that light affects the accumulation of organic matter and biomass via photosynthesis.…”

Section: Introductionmentioning

confidence: 99%

Light affects competition for inorganic and organic nitrogen between maize and rhizosphere microorganisms

Stange

Richter

et al. 2007

Plant Soil

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“…Although the uptake of nutrition in plants is known to be influenced by light and temperature (Lahti et al, 2005;Baligar et al, 2006), the interaction between nutritional status and the circadian clock is less well studied. The homeostasis of Cu is known to influence the regulation of oscillator genes Peñarrubia et al, 2010).…”

mentioning

confidence: 99%

Iron Is Involved in the Maintenance of Circadian Period Length in Arabidopsis

et al. 2013

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The homeostasis of iron (Fe) in plants is strictly regulated to maintain an optimal level for plant growth and development but not cause oxidative stress. About 30% of arable land is considered Fe deficient because of calcareous soil that renders Fe unavailable to plants. Under Fe-deficient conditions, Arabidopsis (Arabidopsis thaliana) shows retarded growth, disordered chloroplast development, and delayed flowering time. In this study, we explored the possible connection between Fe availability and the circadian clock in growth and development. Circadian period length in Arabidopsis was longer under Fe-deficient conditions, but the lengthened period was not regulated by the canonical Fe-deficiency signaling pathway involving nitric oxide. However, plants with impaired chloroplast function showed long circadian periods. Fe deficiency and impaired chloroplast function combined did not show additive effects on the circadian period, which suggests that plastid-to-nucleus retrograde signaling is involved in the lengthening of circadian period under Fe deficiency. Expression pattern analyses of the central oscillator genes in mutants defective in CIRCADIAN CLOCK ASSOCIATED1/LATE ELONGATED HYPOCOTYL or GIGANTEA demonstrated their requirement for Fe deficiency-induced long circadian period. In conclusion, Fe is involved in maintaining the period length of circadian rhythm, possibly by acting on specific central oscillators through a retrograde signaling pathway.

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Light Intensity Effects on Growth and Micronutrient Uptake by Tropical Legume Cover Crops

Cited by 36 publications

References 14 publications

Photosynthetic Photon Flux Density, Carbon Dioxide Concentration and Temperature Influence Photosynthesis in Crotalaria Species

Photosynthetic Photon Flux Density, Carbon Dioxide Concentration and Temperature Influence Photosynthesis in Crotalaria Species

Light affects competition for inorganic and organic nitrogen between maize and rhizosphere microorganisms

Iron Is Involved in the Maintenance of Circadian Period Length in Arabidopsis

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