Influence of P-Ca on cytokinins in xylem sap and on stomatal resistance in apple

Authors

  • Homero Ramírez Departemento de Horticultura. Universidad Autónoma Agraria Antonio Narro http://orcid.org/0000-0003-0876-557X
  • Aarón Isain Malendres-Álvarez Riego y Drenaje. Universidad Autónoma Agraria Antonio Narro
  • Alejandro Zermeño-González Riego y Drenaje. Universidad Autónoma Agraria Antonio Narro
  • Diana Jasso-Cantú Fitomejoramiento. Universidad Autónoma Agraria Antonio Narro: Saltillo, Coahuila, MX
  • José ´Ángel Villarreal-Quintanilla Botánica. Universidad Autónoma Agraria Antonio Narro

DOI:

https://doi.org/10.19136/era.a8n1.2580

Keywords:

Apple, xylem sap, prohexadione-ca, cytokinins, stomatal resistance.

Abstract

With the purpose to search upon the cytokinins origin, a study was conducted on the effects of prohexadione-ca (P-Ca) on cytokinins in xylem sap and on stomatal resistance in apple. Golden Delicious seedlings were sprayed with 100 ppm P-Ca. Stomatal leaf resistance was measured at intervals between 1 and 4 hours of spraying and 15 days after the treatment. Golden Delicious trees were sprayed with 200 ppm P-Ca two weeks after full bloom. At intervals between 1 and two weeks after P-Ca treatment, the main de-shooted stem was removed from root system and xylem sap was collected for cytokinins analysis using the suction technique. Prohexadioneca significantly increased stomatal resistance (range 2.74-4.35 s/cm−1) when compared to control (range 2.12-3.44 s/cm−1); however, P-Ca did not modify the level of cytokinins in xylem sap since range values were between 0.10 to 0.20 μg kinetin equivalents/20 ml xylem sap for both, cytokinin and control.

 

 

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Author Biography

  • Homero Ramírez , Departemento de Horticultura. Universidad Autónoma Agraria Antonio Narro

    Delegado por México ante la International Society for Horticulture Science (ISHS).

References

Biddington JA, Thomas TH (1973) A modified Amaranthus betacyanin bioassay for the rapid determination of cytokinins in plant extracts. Planta 111: 183-186.

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Martin GC, Williams MW, Batjer LP (1964) Movement and fate of labelled N-dimethyl-amino-succinic acid (B-nine), a size controlling compound in apple seedlings. Proceedings American Society for Horticulture Sciences 84: 7-13.

McElrone AJ, Earles JM, Knipfer TM, Albuquerque CP, Brodersen CR, Cuneo IF (2018) Changes in xylem conducting capacity and water storage across species: how can variable air content of xylem cells affect sap flow?. Acta Horticulturae 1222: 5-12.

Nečas T, Wolf J, Kiss T, Láčík J, Letocha T (2018) Use of different plant growth regulators for control of shoot branching in apple and pear trees. Acta Horticulturae 1206: 225-232.

Orton PJ, Mansfiel TA (1976) Studies of the mechanism by which daminozide (B9) inhibits stomatal opening. Journal Experimental Botany 27 (96): 125-133.

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Published

2021-03-29

Issue

Section

SCIENTIFIC NOTE

How to Cite

Ramírez , H., Malendres-Álvarez, A. I., Zermeño-González, A. ., Jasso-Cantú, D., & Villarreal-Quintanilla, J. ´Ángel . (2021). Influence of P-Ca on cytokinins in xylem sap and on stomatal resistance in apple. Ecosistemas Y Recursos Agropecuarios, 8(1). https://doi.org/10.19136/era.a8n1.2580

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