Abstract
ABSTRACT Guava is a fruit widely produced in Northeast Brazil, a region that has sources of water with high levels of salts, making it difficult for irrigated fruit production to expand. Thus, it is extremely important to search for techniques that allow the management of these waters in irrigated agriculture. Thus, the objective of present study was to evaluate the photosynthetic pigments, the quantum yield of photosystem II, and the intercellular leakage of electrolytes in the leaf blade of ‘Paluma’ guava seedlings as a function of irrigation with water of different salinities and foliar application of salicylic acid during rootstock formation phase. The experiment was conducted in a greenhouse, using the randomized block design in a 5 × 5 factorial arrangement, which consisted of five values of electrical conductivity of water - ECw (0.6, 1.5, 2.4, 3.3, and 4.2 dS m-1) and five concentrations of salicylic acid (0, 0.8, 1.6, 2.4, and 3.2 mM L-1), with four replicates, and two plants per plot. Salicylic acid up to 1.3 mM L-1 increased the relative water content and decreased electrolyte leakage in the leaf blade of ‘Paluma’ guava seedlings. Foliar application of salicylic acid at a concentration of 1.7 mM L-1 attenuated the effects of salt stress on chlorophyll a of guava seedlings irrigated with water of up to 1.6 dS m-1. The deleterious effects of salt stress on carotenoid concentration and quantum efficiency of photosystem II were not attenuated by the application of salicylic acid.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Salicylic acid up to 1.3 mM L-1 increased relative water content.
- Taxon
- guava
Psidium guajavae0 - Material
- ‘Paluma’e0
- Organ / stage
- leaf bladee0
- Treatment
- Salicylic acid up to 1.3 mM L-1e0
- Outcome
- relative water contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salicylic acid up to 1.3 mM L-1 increased the relative water content and decreased electrolyte leakage in the leaf blade of ‘Paluma’ guava seedlings”
Claim · model-written summary
Salicylic acid up to 1.3 mM L-1 decreased electrolyte leakage.
- Taxon
- guavaPsidium guajavae0
- Material
- ‘Paluma’e0
- Organ / stage
- leaf bladee0
- Treatment
- Salicylic acid up to 1.3 mM L-1e0
- Outcome
- electrolyte leakagee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salicylic acid up to 1.3 mM L-1 increased the relative water content and decreased electrolyte leakage in the leaf blade of ‘Paluma’ guava seedlings”
Claim · model-written summary
Foliar salicylic acid at 1.7 mM L-1 attenuated salt-stress effects on chlorophyll a up to 1.6 dS m-1 water salinity.
- Taxon
- guavaPsidium guajavae0
- Treatment
- Foliar application of salicylic acid at a concentration of 1.7 mM L-1e0
- Outcome
- effects of salt stress on chlorophyll ae0
- Direction
- attenuatede0
- Qualifier
- water of up to 1.6 dS m-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of salicylic acid at a concentration of 1.7 mM L-1 attenuated the effects of salt stress on chlorophyll a of guava seedlings irrigated with water of up to 1.6 dS m-1”
Claim · model-written summary
Salicylic acid did not attenuate salt-stress effects on carotenoid concentration.
- Taxon
- guavaPsidium guajavae1
- Treatment
- application of salicylic acide0
- Outcome
- carotenoid concentratione0
- Direction
- not attenuatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deleterious effects of salt stress on carotenoid concentration and quantum efficiency of photosystem II were not attenuated by the application of salicylic acid”
e1“chlorophyll a of guava seedlings”
Claim · model-written summary
Salicylic acid did not attenuate salt-stress effects on photosystem II quantum efficiency.
- Taxon
- guavaPsidium guajavae1
- Treatment
- application of salicylic acide0
- Outcome
- quantum efficiency of photosystem IIe0
- Direction
- not attenuatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deleterious effects of salt stress on carotenoid concentration and quantum efficiency of photosystem II were not attenuated by the application of salicylic acid”
e1“chlorophyll a of guava seedlings”
The same questions in other papers
salicylic acid · physiology: pigments · Psidium guajava (guava)Results agree
1 paper in the same direction as this paper
- positive
salicylic acid · physiology: water · Psidium guajava (guava)Results agree
1 paper in the same direction as this paper
- positive
application · physiology: pigments · Psidium guajava (guava)Positive and negative results
7 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
5 papers more in this group
See all 9 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.