• Title/Summary/Keyword: Root primordia

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Morphological and Anatomical Response of Rice and Barnyardgrass to Herbicides under Various Cropping Patterns -II. Response to Bensulfuron (재배양식(栽培樣式)에 따른 수종(數種) 제초제(除草劑)에 대한 벼와 피의 해부형태적(解剖形態的) 반응차이(反應差異) - II. Bensulfuron 에 대한 반응차이(反應差異))

  • Chon, S.U.;Guh, J.O.;Kuk, Y.I.;Han, S.U.
    • Korean Journal of Weed Science
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    • v.16 no.3
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    • pp.230-236
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    • 1996

  • Pot experiment in greenhouse was conducted to determine the effect of growth and anatomical characteristics of bensulfuron on the seedlings of rice and barnyardgrass. Formulated bensulfuron was soil applied at 102g ai/ha to rice and barnyardgrass grown under various cropping patterns at 5 days after seeding or transplanting. At 10 days after application, plants were harvested to examine growth and anatomical changes of rice and barnyardgrass. Bensulfuron did not affect the growth and development of rites under dry seeded condition and trnsplanting condition while inhibited severely those of rice under water-seeded condition compared with untreated control. Under water-seeded condition, root growth of rice was much more severely inhibited by bensulfuron than shoot growth. The herbicide retarded the growth of barnyardgrass under dry-seeded condition and more severely inhibited than that under water-seeded condition. Microscopically, the anatomical change induced by bensulfuron occurred only in barnyardgrass under dry-seeded condition, and involved constriction of leaf primordia within leaf sheaths, rupture of mesophyll cell, and irregular cell arrangement. These anatomical alterations differed from and were not associated with the differential growth response.

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