Salinity Effects on Germination and Mobilization of Reserves in Jojoba Seed
- Safdar A. Kayani,
- Himayat H. Naqvi and
- Irwin P. Ting
Jojoba [Simmondsia chinensis (Link) C.K. Schneid.] is a new oil (wax) seed crop for arid and semiarid environments where salinity is frequently a major problem. The objectives of this work were to study the effects of salinity on germination and mobilization of reserves in jojoba seed. Salt concentrations (NaCl:CaCl2 1:1, w/w) having electrical conductivities (EC) of 0, 5, 10, and 15 dS/m significantly reduced germination, fresh weight of seedlings, and the amount of lipid used in ‘Vista’ jojoba. Germination was reduced from 82.6% in nonsaline conditions to 42.6%, fresh weight was reduced from 314 to 98 mg, and the amount of lipid used was reduced from 136 to 83 mg in strong (EC = 15.0 dS/m) saline treatments. Higher levels of salinity also resulted in accumulation of total soluble sugars, delayed initiation of germination and lipid breakdown, and decreased C38 and C40 esters with an increase in C42. These data suggest jojoba is not salt-tolerant during germination.
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