Wound-induced hydraulic signals and stimulus transmission in Mimosa pudica L.

The mechanism of wound signalling in Mimosa is discussed with a brief historical survey. It is demonstrated that strong wound-induced hydraulic signals occur in Mimosa pudica L., as in many other plants, and that the basipetal mass flows associated with these events could disperse solutes from the wound site at rates of at least 15 mm s-1 and possibly up to 300 mms-1 . When such wound-induced 'hydraulic dispersal' is taken into account, Ricca's theory of chemical signalling can explain long-distance transmission in Mimosa. The pattern of long-distance wound signalling in Mimosa is shown to be consistent with such a model. Implications for theories of electrical signalling in Mimosa are discussed and it is concluded, in agreement with some previous workers, that systemic wound-induced electrical phenomena in Mimosa are not travelling signals, but are local responses to the travelling chemical messengers.

[1]  Dianna J. Bowles,et al.  Systemic responses arising from localized heat stimuli in tomato plants , 1989 .

[2]  Barbara G. Pickard,et al.  Mediation of rapid electrical, metabolic, transpirational, and photosynthetic changes by factors released from wounds. III. Measurements of CO2 and H2O flux , 1976 .

[3]  R. W. Snow.  Conduction of Excitation in Stem and Leaf of Mimosa pudica , 1924 .

[4]  M. Malone,et al.  The transpiration stream - Hydraulic signals , 1993 .

[5]  A. L. Houwink,et al.  The conduction of excitation in Mimosa pudica , 1935 .

[6]  M. Dixon,et al.  The hydraulic architecture of roses (Rosa hybrida) , 1991 .

[7]  M. Samejima,et al.  Membrane Potentials and Resistances of Excitable Cells in the Petiole and Main Pulvinus of Mimosa pudica , 1982 .

[8]  J. Bose.  The motor mechanism of plants , 1928 .

[9]  G. ROBLIN,et al.  MIMOSA PUDICA: A MODEL FOR THE STUDY OF THE EXCITABILITY IN PLANTS , 1979 .

[10]  P. Minchin,et al.  Electrical signalling and systemic proteinase inhibitor induction in the wounded plant , 1992, Nature.

[11]  B. Buttery,et al.  Manometric Measurement of Turgor Pressures in Laticiferous Phloem Tissues2 , 1966 .

[12]  H. Jones,et al.  The relationship between wound‐induced proteinase inhibitors and hydraulic signals in tomato seedlings , 1994 .

[13]  S. Morse.  Water balance in Hemizonia luzulifolia: the role of extracellular polysaccharides , 1990 .

[14]  Ubaldo Ricca.  Transmission of Stimuli in Plants , 1926, Nature.

[15]  M. Malone,et al.  Wound-Induced Hydraulic Signals: Survey of Occurrence in a Range of Species , 1993 .

[16]  R L Satter,et al.  Leaf movements and tendril curling , 1979 .

[17]  Paul Linstead,et al.  Changes in Cell Length During Action Potentials in Chara , 1975 .

[18]  Karl Umeath,et al.  Action Potentials of the High-Speed Conduction in Mimosa pudiea and Neptunia plena , 1983 .

[19]  K. Esau.  On the Phloem of Mimosa pudica L. , 1970 .

[20]  Eric Davies,et al.  Action potentials as multifunctional signals in plants: a unifying hypothesis to explain apparently disparate wound responses , 1987 .

[21]  J. Fromm,et al.  Control of phloem unloading by action potentials in Mimosa , 1991 .

[22]  Marvin Weintraub,et al.  LEAF MOVEMENTS IN MIMOSA PUDICA L. , 1952 .

[23]  M. Malone,et al.  Rapid Inhibition of Leaf Growth by Root Cooling in Wheat: Kinetics and Mechanism , 1993 .

[24]  D. Gradmann,et al.  Laser-Interferometric Re-examination of Rapid Conductance of Excitation in Mimosa pudica , 1990 .

[25]  T. Sibaoka.  Action potentials in plant organs. , 1966, Symposia of the Society for Experimental Biology.

[26]  T. Sibaoka,et al.  Physiology of Rapid Movements in Higher Plants , 1969 .

[27]  G. Roblin,et al.  Comparative Histocytology of the Petiole and the Main Pulvinus in Mimosa pudica L. , 1982 .

[28]  Henri Dutrochet.  Mémoires pour servir a l'histoire anatomique et physiologique des végétaux et des animaux , 1837 .

[29]  W. Meier-Augenstein,et al.  The Structure-Activity Relationship of the Turgorin PLMF 1 in the Sensitive Plant Mimosa pudica L.: In Vitro Binding of [14C-Carboxyl]-PLMF 1to Plasma Membrane Fractions from Mimosa Leaves and Bioassays with PLMF I-Isomeric Compounds , 1990 .

[30]  Bratislav Stankovic,et al.  Surface potentials and hydraulic signals in wheat leaves following localized wounding by heat , 1991 .

[31]  Park S. Nobel,et al.  Physicochemical and Environmental Plant Physiology , 1991 .

[32]  E. Steudle,et al.  Axial and Radial Hydraulic Resistance to Roots of Maize (Zea mays L.). , 1989, Plant physiology.

[33]  M. Samejima,et al.  Changes in the extracellular ion concentration in the main pulvinus of Mimosa pudica during rapid movement and recovery , 1980 .

[34]  P. Simons,et al.  THE ROLE OF ELECTRICITY IN PLANT MOVEMENTS , 1981 .