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The Reversal of Scotoactive Stomatal Behavior in some Woody Weeds by Paraquat and 2,4,5-T

Published online by Cambridge University Press:  12 June 2017

I. Madhusudana Rao ,
P.M. Swamy  and
V.S.R. Das
I. Madhusudana Rao
Affiliation:
Dep. of Bot., Sri Venkateswara Univ., Tirupati – 517 502, India
P.M. Swamy
Affiliation:
Dep. of Bot., Sri Venkateswara Univ., Tirupati – 517 502, India
V.S.R. Das
Affiliation:
Dep. of Bot., Sri Venkateswara Univ., Tirupati – 517 502, India
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Abstract

A typical scotoactive stomatal behavior was noticed in Carissa spinarum L.; Gymnosporia emarginata Laws; Maba buxifolia Cl.; Flacourtia sepiaria Roxb.; Dodonaea viscosa L. and Randia malabarica Lamk. This stomatal behavior was reversed artificially by foliar application of paraquat (1,1′-dimethyl-4,4′-bipyridinium ion) at 100 ppmw or 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid] at 2000 ppmw. The size of the stomatal aperture, stomatal conductance and the rates of transpiration were enhanced significantly by the herbicide treatment. The physiological basis for the induction of desiccation and death of plant organs is thought to be the excessive stimulation of stomatal aperture, stomatal conductance and consequently high rates of transpiration observed here. The data suggest that herbicide-induced desiccation is the consequence of inhibition of scotoactive behavior and increased water loss with attendant desiccation and death of leaves.

Type
Research Article
Information
Weed Science , Volume 25 , Issue 6 , November 1977 , pp. 469 - 472
Copyright
Copyright © 1977 by the Weed Science Society of America 

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References

Literature Cited

1. Ashton, F.M. and Crafts, A.S. 1973. Mode of action of Herbicides. John Wiley & Sons. New York. 504 pp.Google Scholar
2. Bovey, R.W., Baur, J.R., and Morton, H.L. 1970. Control of huisache and associated woody species in south Texas. J. Range Manage. 23:47–50.Google Scholar
3. Carbett, J.R. 1974. The biochemical mode of action of pesticides. Academic Press. New York, 330 pp.Google Scholar
4. Das, V.S.R. and Santakumari, M. 1975. Stomatal behavior towards four classes of herbicides as a basis of selectivity to certain weeds and crop plants. Proc. Indian Acad. Sci. Sect. B. 82:108–116.Google Scholar
5. Dodge, A.D. 1975. Some mechanisms of herbicide action. Sci. Prog., (London) 62:447–466.Google Scholar
6. Dowler, C.C., Tschirley, F.H., Bovey, R.W., and Morton, H.L. 1970. Effect of aerially-applied herbicides on Texas and Puerto Rico forests. Weed Sci. 18:164–168.CrossRefGoogle Scholar
7. Gindel, I. 1970. The nocturnal behavior of xerophytes grown under arid conditions. New Phytol. 69:399–404.CrossRefGoogle Scholar
8. Hull, H.M. and Morton, H.L. 1971. Morphological responses of two mesquite varieties to 2,4,5-T and picloram. Weed Sci. 19:712–716.Google Scholar
9. Mees, G.C. 1960. Experiments on the herbicidal action of 1,1′-ethylene-2,2′-dipyridylium bromide. Ann. Appl. Biol. 48:601–612.Google Scholar
10. Milthorpe, F.L. and Penman, H.L. 1967. The diffusive conductivity of the stomata of wheat leaves. J. Exp. Bot. 18:422–457.Google Scholar
11. Morton, H.L. 1966. Influence of temperature and humidity on foliar absorption, translocation and metabolism of 2,4,5-T by mesquite seedlings. Weeds 14:136–141.Google Scholar
12. Sampson, J. 1961. A method for replicating dry moist surfaces for examination by light microscopy. Nature 191:932–933.CrossRefGoogle ScholarPubMed
13. Sands, R. and Bachelard, E.P. 1973. Uptake of picloram by Eucalypt leaf discs. II. Role of stomata. New Phytol. 72:87–89.Google Scholar
14. Spanner, D.C. and Heath, O.V.S. 1951. Experimental studies of the relation between carbon assimilation and stomatal movement. Ann. Bot. 15:319–331.Google Scholar
15. Tueller, P.T. and Evans, R.A. 1969. Control of green rabbit-brush and big sagebrush with 2,4-D and picloram. Weed Sci. 17:233–235.Google Scholar
16. Van Oorschot, J.L.P. 1970. Effect of transpiration rate of bean plants on inhibition of photosynthesis by some root-applied herbicides. Weed Res. 10:230–242.Google Scholar