Growth and Gas Exchange of Cnidoscolus quercifolius Fertilized With Potassium and Under Water Deficit

Ramos, Fabio Rodrigues; Freire, Antônio Lucineudo de Oliveira

doi:10.5539/jas.v11n11p23

Cited by 2 publications

(2 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mattos) [51] and faveleira (Cnidoscolus quercifolius Pohl.) [52]. Despite the reduction in the photosynthetic rate, due to the increase in the water turning, it can be seen that this effect is attenuated by the use of potassium, especially at doses of 100 and 150 mg dm -3 of K (Table 5).…”

Section: Resultsmentioning

confidence: 96%

Gas Exchange of Oiticica Seedlings in Response to Potassium Fertilization and Water Turning

Sousa

Freire

2022

JEAI

Self Cite

View full text Add to dashboard Cite

Aims: This objective of this work was to evaluate the effects of water deficiency on physiological aspects of oiticica plants, as well as the capacity of potassium fertilization to attenuate such effects. Study Design: The treatments were distributed in an entirely randomized design (DIC), consisting of a 4x4 factorial, with four levels of potassium (K) and four water turning, with five repetitions. Place and Duration of Study: The experiment was conducted in a shaded environment, with 50% light interception, in the Forest Nursery of UAEF/UFCG, between January 2020 and July 2020. Methodology: The relative water content (RWC), transpiration (E) and photosynthesis (A) rates, stomatal conductance (gs), and internal CO2 concentration (Ci) were evaluated, and from the values of A and E, the intrinsic water use efficiency (EUAi) was calculated and, with the data of A and Ci, the carboxylation efficiency (A/Ci). Results: There was significant interaction of treatments in the parameters RWC, E, gs, A and EUAi and isolated effect of water turning on Ci and A/Ci. Irrigation daily or every five days provided the maintenance of higher water status and better stomatal behavior, and the plants were sensitive to water stress provided by longer water turnings (every 10 and 15 days). The fertilization with 100 and 150 mg dm-3 of K kept the values of E and A high, even under low water availability. Conclusion: Potassium fertilization proved to be effective in attenuating the negative effects caused by water deficiency on gas exchange and WUEi of the seedlings, with highlights for 100 and 150 mg dm-3 of K levels.

show abstract

Section: Resultsmentioning

confidence: 96%

Gas Exchange of Oiticica Seedlings in Response to Potassium Fertilization and Water Turning

Sousa

Freire

2022

JEAI

Self Cite

View full text Add to dashboard Cite

show abstract

“…Likewise, water deficiency resulted in decreases of 44% and 48% in plant height and 25% and 31% in stem diameter, when the plants were kept at 25%pc, in relation to the control treatment in Cnidoscolus quercifolius (Pohl.) (RAMOS et al, 2019).…”

Section: Plant Height and Stem Diametermentioning

confidence: 99%

Growth and organic solutes accumulation in seedlings of Caatinga tree species in response of water deficit and potassium

Almeida¹,

Freire²,

Bakke³

et al. 2021

RICA

Self Cite

View full text Add to dashboard Cite

Drought stress negatively influences a variety of essential physiological process for plant growth and biomass production, and potassium contributes to the absorption of water and maintaining cell turgor, being crucial to understand the seedlings water stress responses. This research aimed to verify the effects to water deficiency and potassium on the growth and accumulation of organic solutes in Myracrodruon urundeuva, Libidibia ferrea, and Mimosa tenuiflora. The treatments were distributed in a 3 x 3 factorial scheme, with three water levels (100%pc - control, 50%pc - moderate water deficit, and 25%pc - severe water deficit) and three doses of potassium (0, 97.5 and 195 mg dm-3 K). The plants were sown in black plastic bags, containing 5 kg of soil. Were evaluated plant height, stem diameter, and leaf concentrations of total soluble sugars, total free amino acids, and proteins. The water deficit caused a reduction in the growth of M. urundeuva and M. tenuiflora plants, regardless of the added potassium. The plants of M. urundeuva and M. tenuiflora were not demanding in potassium, while potassium fertilization with 97.5 mg dm-3 K favored L. ferrea plants, especially when kept under moderate water deficit. The moderate water deficit promoted accumulation of total free amino acids and soluble proteins in M. urundeuva, while in L. ferrea there was accumulation of total free amino acids under severe water deficit. Increase in the potassium promoted reduction in the concentrations of total soluble sugars and soluble proteins.

show abstract

Growth and Gas Exchange of Cnidoscolus quercifolius Fertilized With Potassium and Under Water Deficit

Cited by 2 publications

References 21 publications

Gas Exchange of Oiticica Seedlings in Response to Potassium Fertilization and Water Turning

Gas Exchange of Oiticica Seedlings in Response to Potassium Fertilization and Water Turning

Growth and organic solutes accumulation in seedlings of Caatinga tree species in response of water deficit and potassium

Contact Info

Product

Resources

About