Sensitivity to ethylene: the key factor in submergence-induced shoot elongation of Rumex
نویسندگان
چکیده
منابع مشابه
Long-term submergence-induced elongation in Rumex palustris requires abscisic acid-dependent biosynthesis of gibberellin1.
Rumex palustris (polygonceae) responds to complete submergence with enhanced elongation of its youngest petioles. This process requires the presence of gibberellin (GA) and is associated with an increase in the concentration of GA1 in elongating petioles. We have examined how GA biosynthesis was regulated in submerged plants. Therefore, cDNAs encoding GA-biosynthetic enzymes GA 20-oxidase and G...
متن کاملThe role of ethylene in shoot elongation with respect to survival and seed output of flooded Rumex maritimus L. plants
R um ex m aritim us L. occurs in fre quently flooded sites of lowland flood plains. Upon submergence this species exhibited rapid elongation of shoots, but the response depended upon the developmental stage when flooding was initiated. In the rosette stage, petioles showed a fast and large response; during early stem elonga tion the response of petioles was less, but the extension of the lowe...
متن کاملEthylene-promoted elongation: an adaptation to submergence stress.
BACKGROUND A sizeable minority of taxa is successful in areas prone to submergence. Many such plants elongate with increased vigour when underwater. This helps to restore contact with the aerial environment by shortening the duration of inundation. Poorly adapted species are usually incapable of this underwater escape. SCOPE Evidence implicating ethylene as the principal factor initiating fas...
متن کاملPlant movement. Submergence-induced petiole elongation in Rumex palustris depends on hyponastic growth.
The submergence-tolerant species Rumex palustris (Sm.) responds to complete submergence by an increase in petiole angle with the horizontal. This hyponastic growth, in combination with stimulated elongation of the petiole, can bring the leaf tips above the water surface, thus restoring gas exchange and enabling survival. Using a computerized digital camera set-up the kinetics of this hyponastic...
متن کاملIntraspecific variation in the magnitude and pattern of flooding-induced shoot elongation in Rumex palustris.
BACKGROUND AND AIMS Intraspecific variation in flooding tolerance is the basic pre-condition for adaptive flooding tolerance to evolve, and flooding-induced shoot elongation is an important trait that enables plants to survive shallow, prolonged flooding. Here an investigation was conducted to determine to what extent variation in flooding-induced leaf elongation exists among and within populat...
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ژورنال
عنوان ژورنال: Plant, Cell and Environment
سال: 1996
ISSN: 0140-7791,1365-3040
DOI: 10.1111/j.1365-3040.1996.tb00021.x