다양한 재배양식하에서 재배된 벼와 피에 파종 및 이앙후 5일째에 bensulfuron 102g ai/ha를 토양처리하여 그들의 생장 및 해부학적 반응차이를 구명하고자 온실내에서 pot 시험으로 수행되었다. 초장, 근장, 지상부 및 지하부 생체중을 조사한 결과, 건답직파벼 및 이앙벼의 생장 및 발육은 무처리와 유사하거나 증가하는 경향을 보였으나 담수직파벼는 무처리에 비해 심하게 억제되었으며, 지상부보다는 지하부가 더 심하게 억제되었다. 한편 피는 건답조건 에서 억제정도가 다소 낮게 나타났으나 담수조건에서는 치명적으로 억제되었다. Bensulfuron에 의한 주요한 해부학적 반응은 건답직파조건의 피에서만 엽시원체의 위축 및 엽육세포의 부분적 파괴로 인한 세포배열의 규칙성 상실 등이 야기되었다. 결국, 건답직파벼 및 이앙벼는 Bensulfuron에 대해 안전하였으나 담수직파벼는 심한 약해가 유발되었다. 본 연구에서 해부학적 반응차이는 생장반응의 차이와 반드시 일치하지 않게 나타났다.
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.
