Premium
Salt and Water Stress Effects on Germination of Guayule Seeds 1
Author(s) -
Miyamoto S.,
Sosnovske K.,
Tipton J.
Publication year - 1982
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1982.00021962007400020011x
Subject(s) - germination , salinity , agronomy , soil salinity , cultivar , salt (chemistry) , petri dish , soil water , environmental science , salt water , chemistry , horticulture , biology , soil science , environmental engineering , ecology , genetics
In view of developing domestic rubber productions, guayule ( Parthenium argentatum G.) is receiving renewed interest; however, necessary cultural practices have not been well established, especially under saline conditions. Studies were performed, therefore, to evaluate salt and soil water stress effects on seed germination. The test materials included four USDA selections (11646, 11604, 11633, and A48118) and one cultivar (593). Petri dish solution cultures were used for evaluating salt effects, and two sandy soils (Typic Torrifluvents and Typic Torripsamments) placed in petri dishes were used for studying soil water stress effects. Results indicate that seed germination may be reduced by approximately 25%, due to salinity of salt solutions ranging from 7 to 19 mmho/cm with a descending order of tolerance of 11646, 593,11604 = 11633, and A48118. Selection 11646 showed excellent characteristics as well as high salt tolerance. Specific ion effects were insignificant when tested in salt solutions having mixed ion compositions. Soil water stress needs to be controlled at less than about 0.8 bar if germination is to be accomplished without adverse effects of water stress.