Potencial hídrico

Correia, Sandra

doi:10.24927/rce2014.003

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Water potential in the leaf is very important to understand the water relations in the plant and between plant and external environment (soil and atmosphere) (Correia, 2014). This potential provides a relative index of the water stress to which the plant is subjected, identifying various physiological alterations, in which the most affected process is cell growth, followed by photosynthesis (Taiz et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Water potential and gas exchanges in sugarcane irrigated with saline waters

Lira

Silva

Barros

et al. 2018

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

In Pernambuco, state in the northeastern region of Brazil, in the coastal areas, due to the intrusion of seawater, the waters used for sugarcane irrigation can have high salt contents and cause serious problems to soil and plant. The present study aimed to evaluate the effects of irrigation with saline water on the physiology of sugarcane, variety RB867515, irrigated under five salinity levels of 0.5; 2.0; 3.5; 5.0 and 6.5 dS m-1 in a completely randomized design, with four replicates in drainage lysimeters. The study was conducted in the period from December 2014 to June 2015, at the Federal Rural University of Pernambuco (UFRPE). Salinity levels were obtained by dissolving NaCl and CaCl2 in water from the local supply system (ECw = 0.5 dS m-1). Leaves were analyzed for stomatal conductance, transpiration and photosynthesis at 140, 229 and 320 days after planting (DAP) and for water potential at 137, 243 and 318 DAP. Increase in irrigation water salinity inhibited all variables at the respective plant ages and with greater intensity in the first evaluations (140 and 229 DAP) for stomatal conductance and transpiration. Photosynthesis and water potential showed the greatest linear reductions at the last data collection (320 and 318 DAP), respectively. Increase in salinity of irrigation water hampered water potential and gas exchange in the leaves of RB867515 sugarcane.

show abstract

Section: Introductionmentioning

confidence: 99%

Water potential and gas exchanges in sugarcane irrigated with saline waters

Lira

Silva

Barros

et al. 2018

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

show abstract

Germination of spores of Amazonian ferns Polypodium aureum in different culture media

Alves

Takata

2019

Ornam. Hortic.

View full text Add to dashboard Cite

The greatest diversity of ferns occurs in the tropics, where approximately three in four of the species are found. In the Brazilian flora, the ferns have megadiversity, being an important plant group. The objective was to evaluate the spores germination of ferns Polypodium aureum in different types of culture medium. The sporangia were removed from fertile fronds and sterilized with sodium hypochlorite 0.57% during 30 minutes. After sterilization, the sporangia were seeded in culture media agar, MS, SH, White and B5. The experimental design was completely randomized being composed of 5 treatments (agar media, B5, SH, White and MS) and 10 replications. The ratings occurred every 3 days over a period of 45 days, counting the number of spores germinated. After this period, the germination percentage, germination time on medium, germination speed index and timing of germination were calculated. The germination percentage and the index of synchronization have not changed in function of different culture media. The medium White presented the highest average for the germination speed index whereas the agar media, MS, SH and B5 had the same germination speeds. The percentage of mortality was higher in MS medium, the White medium presented the lowest percentage of mortality, and the media composed by agar, SH and B5 showed intermediate values. The lowest average germination time occurred at the media SH and B5, since the environment composed by agar showed higher average germination time. The media MS and White showed similar results to the agar, SH and B5. Based on the obtained results, it can be concluded that the White medium is the most effective on the germination of spores of Polypodium aureum.

show abstract

Potencial hídrico

Cited by 2 publications

References 0 publications

Water potential and gas exchanges in sugarcane irrigated with saline waters

Water potential and gas exchanges in sugarcane irrigated with saline waters

Germination of spores of Amazonian ferns Polypodium aureum in different culture media

Contact Info

Product

Resources

About