Effects of nitrogen form on growth, CO2 assimilation, chlorophyll fluorescence, and photosynthetic electron allocation in cucumber and rice plants

Zhou, Yanhong; Zhang, Yili; Wang, Xuemin; Cui, Jun; Xia, Xiaojian; Shi, Kai; Yu, Jingquan

doi:10.1631/jzus.b1000059

Cited by 55 publications

(40 citation statements)

References 39 publications

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“…Nitrogen is a one of the most critical elements affecting plant growth and development (Zhou et al 2011). Unlike other elements nitrogen is metabolized by plants in two ionic forms NH 4 + andNO 3 - (Olfati et al 2012) which not only affects plant growth but also nutritional quality of higher plants (Sun et al 2014, Sabir et al 2013.…”

Section: Introductionmentioning

confidence: 99%

Effects of different nitrogen forms on growth, phenolics, flavonoids and antioxidant activity in amaranth species

Rozy¹,

Changamu²,

Korir³

et al. 2017

Trop. Plant Res.

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Abstract:Higher plants, accumulate large number of polyphenolic compounds which are believed to act as defence compounds against different environmental constraints. Nitrogen (N) is a critical element for plant growth, absorbed as (NH 4 + ) and (NO 3 -), which affects plant growth and to some extent contributes to secondary metabolites accumulation. Greenhouse experiment was carried out to determine the effect of N forms on growth and phytochemical accumulation in Amaranthus species. Two amaranth varieties; AB6 and AB7 constituted the main plot while three N forms; ammonium, nitrate, ammonium nitrate and control (no N form) represented the subplot. Destructive sampling was done and plant height was recorded. Folin-Ciocalteu's and aluminium trichloride methods were used to determine total phenolic content (TPC) and total flavonoid content (TFC) respectively. DPPH (diphenylpicrylhydrazyl) radical scavenging activity assay was used to obtain total antioxidant activity. variety and TPC accumulation by 23% AB6 and 20% AB7 varieties respectively. Correspondingly, NH 4 + -N form resulted to superior antioxidant DPPH scavenging activity indicated by high scavenging activity and lower IC 50 value (concentration which scavenged 50% of the DPPH radicals). Plant height displayed a significant negative correlation with TFC and TPC accumulation of r= 0.75 and r= 0.81 respectively. The results indicated that ammonium-induced stress enhanced total flavonoids and phenolics accumulation; a salient phytochemical plasticity observed during plant growth and survival trade-off in a vegetable amaranth.

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Section: Introductionmentioning

confidence: 99%

Effects of different nitrogen forms on growth, phenolics, flavonoids and antioxidant activity in amaranth species

Rozy¹,

Changamu²,

Korir³

et al. 2017

Trop. Plant Res.

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“…A interação entre as fontes de nitrogênio (nítrica e amoniacal) nas plantas possui efeitos diferenciados no crescimento, na qualidade vegetal, na produção de biomassa e na reprodução (LANE;BASSIRIRAD, 2002). O amônio poderia ser uma fonte preferencial de nitrogênio, pois sua absorção requer menos energia do que o nitrato (ZHOU et al, 2011). Porém poucas espécies apresentam melhor desempenho quando crescidas apenas com NH 4 + como fonte de nitrogênio (BRITTO et al, 2001).…”

Section: Introductionunclassified

Compostos nitrogenados e carboidratos em sorgo submetido à salinidade e combinações de nitrato e amônio

Lobo¹,

Martins²,

Neto³

et al. 2011

Rev. Ciênc. Agron.

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Compostos nitrogenados e carboidratos em sorgo submetido à salinidade e combinações de nitrato e amônio 1 Nitrogenous compounds and carbohydrates in sorghum subjected to salinity and combinations of nitrate and ammonium ), na presença e ausência de salinidade. A salinidade reduziu a concentração de nitrato nas folhas e colmo, nos tratamentos 100:0 e 75:25. O amônio acumulou-se mais nas plantas com NaCl, nas folhas e colmo. Os teores de aminoácidos livres totais nas folhas não se alteraram, mas, no colmo, aumentaram na presença de sal e aumento do amônio. A concentração de prolina livre nas folhas e colmo elevou-se nas plantas sob salinidade. O conteúdo de nitrogênio total foi maior nas folhas, entretanto não houve grandes alterações com a presença do sal. A concentração de carboidratos solúveis totais foi maior nas plantas tratadas com sal, exceto no colmo 0:100. Nas folhas, o teor de sacarose foi reduzido na presença do NaCl e aumento de amônio, enquanto, no colmo, foi maior no tratamento 75:25 com NaCl. O teor de amido não sofreu alterações com as diferentes combinações nas formas de N e salinidade. Conclui-se que combinações de NO -3 e NH 4 + no meio afetam a acumulação de compostos nitrogenados e carboidratos em folhas e colmo, com presença ou ausência de salinidade, em plantas de sorgo forrageiro. Palavras-chave -Sorghum bicolor. Nitrogênio. Estresse salino.Abstract -The objective of this study was to evaluate the effects of combinations of nitrate and ammonium in the medium, on the accumulation of nitrogen compounds and carbohydrates, in the presence and absence of salinity in sorghum plants. CSF 20 genotype sorghum seeds, were grown in the greenhouse and supplied with a nutritive solution at three different concentrations of nitrate and ammonium (100% NO 3 -: 0% NH 4 + , 75% NO 3 -: 25% NH 4 + e 0% NO 3 -: 100% NH 4 + ) both in the presence and absence of NaCl. Salinity reduced the nitrate concentration in both leaves and stalks in treatments at 100:0 and 75:25. The accumulation of ammonium was higher in those plants, in both leaves and stalk, in the presence of NaCl. The levels of free amino acids in the leaves showed no change, whereas those in the stalk increased in the presence of salt and with the increase of ammonium. The concentration of free proline in both leaves and stalk was higher in plants under salinity. The total nitrogen content was higher in the leaves without, however, showing much change in the presence of salt. The concentration of total soluble carbohydrates was higher in those plants treated with salt, except in the stalk 0:100. Sucrose levels in the leaves were lower in the presence of NaCl and the increase in ammonium, while they were higher in the stalk at 75:25 NaCl. The starch content did not alter much with the different levels of nitrogen and salinity. It is concluded that NO -3 and NH 4 + combinations in the medium affect the accumulation of nitrogen compounds and carbohydrates in the leaves and stalks of sorghum plants, both in the presence and absence of salinity.

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“…NH 4 + -N toxicity can be alleviated and a synergistic growth response can be induced in many plants by --N (Tabatabaei et al 2008). For many plants, mixed NO 3 --N and NH 4 + -N has been documented to be superior over individual NO 3 --N or NH 4 + -N (Zhou et al 2011). The optimal proportion of NO 3 --N to NH 4 + -N for plant growth depends on the plant species, environmental conditions, developmental stage and the total concentration of supplied nitrogen (Tang et al 2011, Guo et al 2012.…”

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confidence: 99%

Effects of different nitrogen forms on the nutritional quality and physiological characteristics of Chinese chive seedlings

Sun

Luo

Liu

2014

Plant Soil Environ.

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Effects of nitrogen form on growth, CO2 assimilation, chlorophyll fluorescence, and photosynthetic electron allocation in cucumber and rice plants

Cited by 55 publications

References 39 publications

Effects of different nitrogen forms on growth, phenolics, flavonoids and antioxidant activity in amaranth species

Effects of different nitrogen forms on growth, phenolics, flavonoids and antioxidant activity in amaranth species

Compostos nitrogenados e carboidratos em sorgo submetido à salinidade e combinações de nitrato e amônio

Effects of different nitrogen forms on the nutritional quality and physiological characteristics of Chinese chive seedlings

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