Limitations to photosynthesis inCoffea canephoraas a result of nitrogen and water availability

DaMatta, Fábio M.; Loos, Rodolfo Araujo; Silva, Emerson Alves da; Loureiro, Marcelo Ehlers

doi:10.1078/0176-1617-00807

Cited by 74 publications

(58 citation statements)

References 26 publications

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“…Intrinsic water-use efficiency (WUE i ) and photosynthetic nitrogen use efficiency (PNUE) was calculated by the ratio of P N to g s and the ratio of P N to leaf N content, respectively (Da Matta et al 2002, Jiao et al 2012. The photosynthetic traits were made on the fully expanded and healthy upper leaves (one leaf per tree) in March (dry season), July (the middle of wet season) and October (the end of wet season), respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Compared with species with high PNUE, coffee plants had relatively low PNUE and P N , and high N requirement, likely due to higher N expenditures in nonphotosynthetic functions, i.e., caffeine (Da Matta et al 2002). Coffee plants under N deficiency appeared to be able to utilize N more efficiently, through increasing N investment into photosynthetic components; and thus to increase PNUE with decreasing N (Da Matta et al 2002). However, we did not find increasing PNUE with decreasing N supply (Table 2).…”

Section: Leaf Traitsmentioning

confidence: 99%

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Effects of fertilization on the growth, photosynthesis, and biomass accumulation in juvenile plants of three coffee (Coffea arabica L.) cultivars

Zhang

Cai

Wang³

et al. 2017

Photosynt.

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We carried out a field experiment in order to study effects of fertilization in juvenile plants of three coffee (Coffea arabica) cultivars in Yunnan, SW China. Fertilization treatments included a control without fertilizer (CK), combinations of three NPK fertilization rates [high fertilization (F H ), medium fertilization (F M ), and low fertilization (F L ) with 135, 90, and 45 g per plant per year, respectively], and at two N:P 2 O 5 :K 2 O ratios (R 1 , 1:0.5:0.8; R 2 , 1:0.8:0.5). The growth in juvenile plants was not altered by fertilization, with two clear growth peaks being observed in both the height and stem growth rates (RGRs) throughout a year. Both F M and F H resulted in significantly higher RGRs in both height and stem diameter compared to F L and CK in all three cultivars. At the same fertilization rate, the leaf area, branch number, longest branch length, internode number, and biomass of R 2 were higher than those of R 1 , and P significantly affected the root biomass and root to shoot ratio. Compared to the F L treatment, both F M and F H treatments resulted in higher net photosynthetic rates and stomatal conductance across seasons, and in higher intrinsic water-use efficiency during the dry season and at the middle of the wet season. Photosynthetic nitrogen use efficiency at R 2 was higher than at R 1 , but no significant differences were observed among the different fertilization rates. Among the three coffee cultivars, Caturra exhibited the highest height, stem diameter, longest branch length, and internode number. Our results indicated that the optimal N:P 2 O 5 :K 2 O ratio is 1:0.8:0.5 for the juvenile growth of coffee plants. Both F M and F H could help optimize the growth and photosynthetic rate of coffee plants, but F M is suitable for the ecological friendly agriculture and economic sustainability in coffee plantations.

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Section: Methodsmentioning

confidence: 99%

Section: Leaf Traitsmentioning

confidence: 99%

Effects of fertilization on the growth, photosynthesis, and biomass accumulation in juvenile plants of three coffee (Coffea arabica L.) cultivars

Zhang

Cai

Wang³

et al. 2017

Photosynt.

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“…The light-adapted initial fluorescence (F 0 0 ) was estimated according to Oxborough and Baker (1997). Using these parameters, the photochemical (q P ) and non-photochemical (NPQ) quenching coefficients and the apparent electron transport rate (ETR) were calculated as described elsewhere (DaMatta et al 2002a, Chaves et al 2008.…”

Section: Methodsmentioning

confidence: 99%

Source strength increases with the increasing precociousness of fruit maturation in field-grown clones of conilon coffee (Coffea canephora) trees

Morais

Cavatte

Detmann

et al. 2012

Trees

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In earlier-maturing coffee clones, owing to the shorter time required for fruit filling and ripening, photoassimilates should be transported to fruits in a period shorter than that found in intermediate-or late-maturing clones. We hypothesised that at a given source-to-sink ratio, a presumably greater sink strength in early-maturing clones relative to intermediate-and late-maturing individuals should be correlated to increased rate of net carbon assimilation (A) and greater photo-assimilate transport to the fruits. Overall, earlier-maturing clones displayed greater A rates than the intermediate-maturing clones, which, in turn, had higher A than their late counterparts. Changes in A were largely associated with changes in stomatal conductance. Only marginal alterations occurred in the internal-to-ambient CO 2 concentration ratio, the carbon isotope composition ratio, soluble sugars and chlorophyll a fluorescence parameters. Some changes in starch pools were detected among treatments. To the best of our knowledge, this is the first report showing evidence that increased precociousness of fruit growth and maturation results in higher A and thus increased source strength, a fact associated to a large degree with higher stomatal aperture.

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“…Under conditions of environmental stresses, such as nitrogen (N) deficiency, the amount of excess energy can even increase due to stress-induced decreases in CO 2 fixation capacity (e.g., DaMatta et al, 2002;Cruz et al, 2003). This lowered capacity means that a given light intensity is potentially in greater excess under N deficiency (Verhoeven et al, 1997).…”

Section: Introductionmentioning

confidence: 98%

Photosynthesis and photoprotection in coffee leaves is affected by nitrogen and light availabilities in winter conditions

Pompelli

Martins

Antunes

et al. 2010

Journal of Plant Physiology

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111

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Coffee is native to shady environments but often grows better and produces higher yields without shade, though at the expense of high fertilization inputs, particularly nitrogen (N). Potted plants were grown under full sunlight and shade (50%) conditions and were fertilized with nutrient solutions containing either 0 or 23 mM N. Measurements were made in southeastern Brazil during winter conditions, when relatively low night temperatures and high diurnal insolation are common. Overall, the net carbon assimilation rate was quite low, which was associated with diffusive, rather than biochemical, constraints. N deficiency led to decreases in the concentrations of chlorophylls (Chl) and total carotenoids as well as in the Chl/N ratio. These conditions also led to qualitative changes in the carotenoid composition, e.g., increased antheraxanthin (A) and zeaxanthin (Z) pools on a Chl basis, particularly at high light, which was linked to increased thermal dissipation of absorbed light. The variable-to-maximum fluorescence ratio at predawn decreased with increasing A+Z pools and decreased linearly with decreasing N. We showed that this ratio was inadequate for assessing photoinhibition under N limitation. Expressed per unit mass, the activities of superoxide dismutase and glutathione reductase were not altered with the treatments. In contrast, ascorbate peroxidase activity was lower in low N plants, particularly under shade, whereas catalase activity was lower in shaded plants than in sun-grown plants, regardless of the N level. Glutamine synthetase activity was greater in sun-grown plants than in shaded individuals at a given N level and decreased with decreasing N application. Our results suggest that the photoprotective and antioxidant capacity per amount of photons absorbed was up-regulated by a low N supply; nevertheless, this capacity, regardless of the light conditions, was not enough to prevent oxidative damage, as judged from the increases in the H(2)O(2) and malondialdehyde concentrations and electrolyte leakage. We demonstrated that N fertilization could adequately protect the coffee plants against photodamage independently of the anticipated positive effects of N on the photosynthetic capacity.

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Limitations to photosynthesis inCoffea canephoraas a result of nitrogen and water availability

Cited by 74 publications

References 26 publications

Effects of fertilization on the growth, photosynthesis, and biomass accumulation in juvenile plants of three coffee (Coffea arabica L.) cultivars

Effects of fertilization on the growth, photosynthesis, and biomass accumulation in juvenile plants of three coffee (Coffea arabica L.) cultivars

Source strength increases with the increasing precociousness of fruit maturation in field-grown clones of conilon coffee (Coffea canephora) trees

Photosynthesis and photoprotection in coffee leaves is affected by nitrogen and light availabilities in winter conditions

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