지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
Phosphatidic acid (PA) increases in response to wounding at the neighboring unwounded leaf as well as at the wounded leaf of many plants (Lee et at.,1991). This indicates that a signal propagates from the wounded leaf to its neighboring leaves. In this paper we report the speed and direction of propagation for a systemic wound signal that elevates PA. When a leaf of a soybean (Glycine max) seedling at the 2-leaf-stage was wounded, the PA level of the neighboring leaf did not change within the first min, but did increase significantly in 2 min, returning to the control level after 15 min. This implies that the systemic wound signal was generated at least within 2 min of wounding, and was propagated at a speed of at least 10-16 mm/min. When we wounded individual leaves of soybean and tobacco (Nicotiana tabaccum) seedlings that had 3 or 4 leaves, PA levels were elevated only in the younger leaves located above the wounded leaf, but not in the older, lower leaves. Thus, the PA-elevating wound signal preferentially moves upward in these plants.
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