Abstract
Abstract As a preliminary step to using gametophytic selection to obtain genotypes of maize, Zea mays L., differing for abscisic acid (ABA) content and/or sensitivity, the influence of ABA on the in vitro germination and tube growth of maize pollen and the presence of genetic variability for these traits was investigated. In a first experiment, pollen samples of three genotypes were germinated on substrates containing increasing amounts of ABA. Low ABA concentration (0.5 νM) significantly increased pollen germination and tube growth, while 500 νM ABA significantly decreased both traits, thus indicating that ABA can influence the growth of maize pollen in vitro. In a second experiment, eleven inbred lines were screened for the in vitro reactivity of their microgametophytes to ABA. The lines differed significantly for the response (% of control) of tube length, but not of pollen germination to ABA.
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Claims 6
Claim · model-written summary
Low ABA concentration significantly increased maize pollen germination.
- Organ / stage
- pollene0
- Treatment
- Low ABA concentration (0.5 νM)e0
- Outcome
- pollen germinatione0
- Direction
- increasede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low ABA concentration (0.5 νM) significantly increased pollen germination and tube growth”
e1“genotypes of maize, Zea mays L.”
Claim · model-written summary
Low ABA concentration significantly increased maize pollen tube growth.
- Organ / stage
- pollene0
- Treatment
- Low ABA concentration (0.5 νM)e0
- Outcome
- tube growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low ABA concentration (0.5 νM) significantly increased pollen germination and tube growth”
e1“genotypes of maize, Zea mays L.”
Claim · model-written summary
500 νM ABA significantly decreased maize pollen germination.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“500 νM ABA significantly decreased both traits”
e1“the in vitro germination and tube growth of maize pollen”
e2“Low ABA concentration (0.5 νM) significantly increased pollen germination and tube growth”
Claim · model-written summary
500 νM ABA significantly decreased maize pollen tube growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“500 νM ABA significantly decreased both traits”
e1“the in vitro germination and tube growth of maize pollen”
Claim · model-written summary
Maize inbred lines differed significantly in pollen tube-length response to ABA.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lines differed significantly for the response (% of control) of tube length”
e1“the in vitro reactivity of their microgametophytes to ABA”
t0“Maize Genotypes1”
Claim · model-written summary
Maize inbred lines did not differ significantly in pollen-germination response to ABA.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but not of pollen germination to ABA.”
e1“The lines differed significantly for the response (% of control) of tube length”
t0“Maize Genotypes1”
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