INVESTIGADORES
OTEGUI Maria Elena
artículos
Título:
Peg viability and pod set in peanut: Response to impaired pegging and water
Autor/es:
HARO, R.J.; MANTESE, A.; OTEGUI, M.E.
Revista:
FLORA
Editorial:
ELSEVIER GMBH
Referencias:
Año: 2011 vol. 206 p. 865 - 871
ISSN:
0367-2530
Resumen:
Fertilized peanut (Arachis hypogaea L.) ovaries develop into aerial gynophores known as pegs, which are
supposed to endure delayed penetration into the soil (pegging) caused by increased surface soil strength
promoted by drought. There is no information, however, on the pattern of decay in peg viability in
response to impaired pegging duration, which may affect seed yield severely. Two peanut cultivars (Florman
and ASEM) were grown in pots under two contrasting water availability levels (WA) imposed at the
R2 growth stage (start of peg formation). Pegs of ca. 5 mm were tagged at this stage, and WA extended
for 10 different periods (between 7 and 41 days) of restriction to pegging (RPn). Tagged pegs were used
for analysis of histological changes and pod set evaluation. Reduced WA caused a significant (PArachis hypogaea L.) ovaries develop into aerial gynophores known as pegs, which are
supposed to endure delayed penetration into the soil (pegging) caused by increased surface soil strength
promoted by drought. There is no information, however, on the pattern of decay in peg viability in
response to impaired pegging duration, which may affect seed yield severely. Two peanut cultivars (Florman
and ASEM) were grown in pots under two contrasting water availability levels (WA) imposed at the
R2 growth stage (start of peg formation). Pegs of ca. 5 mm were tagged at this stage, and WA extended
for 10 different periods (between 7 and 41 days) of restriction to pegging (RPn). Tagged pegs were used
for analysis of histological changes and pod set evaluation. Reduced WA caused a significant (Ppegging) caused by increased surface soil strength
promoted by drought. There is no information, however, on the pattern of decay in peg viability in
response to impaired pegging duration, which may affect seed yield severely. Two peanut cultivars (Florman
and ASEM) were grown in pots under two contrasting water availability levels (WA) imposed at the
R2 growth stage (start of peg formation). Pegs of ca. 5 mm were tagged at this stage, and WA extended
for 10 different periods (between 7 and 41 days) of restriction to pegging (RPn). Tagged pegs were used
for analysis of histological changes and pod set evaluation. Reduced WA caused a significant (Pn). Tagged pegs were used
for analysis of histological changes and pod set evaluation. Reduced WA caused a significant (PP
¡Ü
0.001)
decrease in peg viability and pod set, but no negative effect was detected on these traits for at least 11
days of treatment. The extent of maximum peg viability (stage 1) was shorter for water deficit (11 days of
RP) than for well-watered plants (15 days of RP), and was followed by a phase of linear decrease (maximum
rate betweenstage 1) was shorter for water deficit (11 days of
RP) than for well-watered plants (15 days of RP), and was followed by a phase of linear decrease (maximum
rate between
−0.056 and0.056 and
−0.073 days−1) in peg viability (stage 2). The latter finished at ca. 33 days
of RP, with permanent loss in peg viability (stage 3). Tissue deterioration began at the start of stage 2,
until complete atrophy was reached at the start of stage 3. This trend proceeded faster for water-deficit
pots and cultivar Florman.0.073 days−1) in peg viability (stage 2). The latter finished at ca. 33 days
of RP, with permanent loss in peg viability (stage 3). Tissue deterioration began at the start of stage 2,
until complete atrophy was reached at the start of stage 3. This trend proceeded faster for water-deficit
pots and cultivar Florman.stage 3). Tissue deterioration began at the start of stage 2,
until complete atrophy was reached at the start of stage 3. This trend proceeded faster for water-deficit
pots and cultivar Florman.stage 3. This trend proceeded faster for water-deficit
pots and cultivar Florman.