Acquisition of desiccation tolerance by isolated maize embryos exposed to different conditions: the questionable role of endogenous abscisic acid

Bochicchio, Adriana; Vernieri, Paolo; Puliga, Serenella; Balducci, F.; Vazzana, Concetta

doi:10.1111/j.1399-3054.1994.tb02996.x

Cited by 17 publications

(2 citation statements)

References 21 publications

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“…The ELISA was performed according to the method described by Walker-Simmons (1987), with minor modifications. The ability of DBPA1 monoclonal antibody to give precise quantitation of ABA in crude aqueous extracts of maize tissues was previously confirmed by validation experiments (Bochicchio et al 1994;Sturaro et al 1996;Aroca et al 2003).…”

Section: Aba Contentmentioning

confidence: 80%

Exogenous ABA accentuates the differences in root hydraulic properties between mycorrhizal and non mycorrhizal maize plants through regulation of PIP aquaporins

et al. 2009

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The arbuscular mycorrhizal (AM) symbiosis has been shown to modulate the same physiological processes as the phytohormone abscisic acid (ABA) and to improve plant tolerance to water deficit. The aim of the present research was to evaluate the combined influence of AM symbiosis and exogenous ABA application on plant root hydraulic properties and on plasma-membrane intrinsic proteins (PIP) aquaporin gene expression and protein accumulation after both a drought and a recovery period. Results obtained showed that the application of exogenous ABA enhanced osmotic root hydraulic conductivity (L) in all plants, regardless of water conditions, and that AM plants showed lower L values than nonAM plants, a difference that was especially accentuated when plants were supplied with exogenous ABA. This effect was clearly correlated with the accumulation pattern of the different PIPs analyzed, since most showed reduced expression and protein levels in AM plants fed with ABA as compared to their nonAM counterparts. The possible involvement of plant PIP aquaporins in the differential regulation of L by ABA in AM and nonAM plants is further discussed.

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Section: Aba Contentmentioning

confidence: 80%

Exogenous ABA accentuates the differences in root hydraulic properties between mycorrhizal and non mycorrhizal maize plants through regulation of PIP aquaporins

et al. 2009

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“…Response to different stresses is often mediated by abscisic acid (ABA) and this hormone also proved to be responsible for cold-acclimation (Lang et al, 1989). An increase of ABA in response to a stress can be quite rapid: in maize, a twofold enhancement of this hormone has been observed as soon as 3 h from starting a slow dry treatment able to induce tolerance to desiccation in excised embryos (Bochicchio et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Response of maize inbred lines to a defoliation treatment inducing tolerance to cold at germination

Frascaroli

Casarini²,

Conti³

2005

Euphytica

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Defoliation during maize (Zea mays L.) kernel development has been observed to induce tolerance to cold of germinating seeds in responsive genotypes. The objectives of this study were to evaluate the response to defoliation of immature embryo and mature seed germinability at cold and to verify if the response was influenced by the developmental stage at which the treatment was applied. In three environments, six inbred lines (B73, IABO78, Lo1016, Lo964, Mo17, Os420) were defoliated (D) approximately 20 days after pollination (DAP) or not defoliated (ND). Immature embryos were excised three days after defoliation and germinated in vitro at 9 or 25 • C. At maturation, kernel germination was tested at the same temperatures. Defoliation improved cold tolerance and mean time to germination (MTG) at 9 • C of both embryos and kernels of Lo1016. To study the effect of kernel developmental stage on response to defoliation, plants of B73, Lo1016 and Lo964 were defoliated at 15, 18, 21, 24, 27, 30, 33, 36, and 39 DAP, or not defoliated. At the same DAP, immature grains were analyzed for dry weight, water and abscisic acid (ABA) content. In Lo1016, low amounts of kernel ABA were detected at all stages, while in Lo964 and B73 ABA increased during development. Lo1016 mature kernels showed an improvement of cold tolerance due to defoliation at all times, while the other genotypes did not. In conclusion inbred lines showed variability for mature seed and immature embryo tolerance to cold at germination and for the ability to acquire tolerance after defoliation.

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Non-Disaccharide-Based Mechanisms of Protection during Drying

et al. 2001

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Acquisition of desiccation tolerance by isolated maize embryos exposed to different conditions: the questionable role of endogenous abscisic acid

Cited by 17 publications

References 21 publications

Exogenous ABA accentuates the differences in root hydraulic properties between mycorrhizal and non mycorrhizal maize plants through regulation of PIP aquaporins

Exogenous ABA accentuates the differences in root hydraulic properties between mycorrhizal and non mycorrhizal maize plants through regulation of PIP aquaporins

Response of maize inbred lines to a defoliation treatment inducing tolerance to cold at germination

Non-Disaccharide-Based Mechanisms of Protection during Drying

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