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Effect of Ethephon on Mesquite and Huisache Stem Anatomy

Published online by Cambridge University Press:  12 June 2017

W. E. Robnett  and
P. R. Morey
W. E. Robnett
Affiliation:
Dep. of Biol. Sci., Texas Tech Univ., Lubbock, TX 79409
P. R. Morey
Affiliation:
Dep. of Biol. Sci., Texas Tech Univ., Lubbock, TX 79409
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Abstract

Application of the ethylene-releasing agent ethephon (2-chloroethylphosphonic acid) as a lanolin paste to stems of honey mesquite [Prosopis juliflora (Swartz) DC. var. glandulosa (Torr.) Cockrell] caused the development of abnormal periderm, cortical, and xylem tissues in a localized portion of the stem within 1 cm of the treatment site. Ethephon inhibited secondary wall deposition in xylem parenchyma cells, whereas normal vessel element differentiation was unaffected. Similar changes in xylem formation occur in ethephon-treated huisache [Acacia farnesiana (L.) Willd.]. Ethephon and 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid] applied separately to honey mesquite and huisache stems have similar inhibitory effects on parenchyma cell differentiation but differ markedly in their effects on vessel element formation.

Type
Research Article
Information
Weed Science , Volume 22 , Issue 3 , May 1974 , pp. 280 - 284
Copyright
Copyright © 1974 by the Weed Science Society of America 

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