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Growth Respiration of a Flood‐Tolerant and a Flood‐Intolerant Senecio Species: Correlation between Calculated and Experimental Values
Author(s) -
LAMBERS HANS,
STEINGRÖVER EVELIENE
Publication year - 1978
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1978.tb02567.x
Subject(s) - senecio , respiration , plantago , flood myth , shoot , botany , dry matter , biology , horticulture , theology , philosophy
Root growth respiration of Senecio aquaticus Hill (flood‐tolerant) and Senecio jacobaea L. (flood‐sensitive) was calculated, assuming different P: O ratios. The growth respiration values were calculated on the basis of the chemical composition of root and shoot dry matter, in combination with published data on the energy costs of biosynthetic and transport processes. The comparison between calculated and experimental values suggests a relatively low efficiency of ATP utilization in the roots of the flood‐tolerant species. Root growth respiration of S. congestus (R.Br.)DC., which is also flood‐tolerant, and Plantago lanceolata L. were also determined. The data showed that not all the flood‐tolerant species investigated had high root growth respiration values. An “overflow model’ is proposed to explain observed differences in root growth respiration between species.