. Author manuscript; available in PMC: 2016 Jul 1.

Published in final edited form as: Microb Ecol. 2015 Feb 3;70(1):61–76. doi: 10.1007/s00248-014-0563-6

Table 4. Desert endophytes are rare in culture but highly diverse.

Isolation frequency was significantly lower than expected given the latitude of the study site, whereas diversity from each host species did not differ from the expected value given latitude. Expected values are means for collections at 30-36°N as presented in refs. 9 and 11 (mean ± S D, and 95% confidence interval). The final column indicates whether the value observed here was significantly higher or lower than the expected value (Z-test).

Measurement	Relevant data: mean ± SD	Expected value (95% CI)	Mean significantly lower/higher than expected (P-value)
Isolation frequency^*	Leaves, 0.9 ± 0.4	40.2 ± 29.4 (8.9-59.9)	Lower than expected; (P<0.0001)^‡
Isolation frequency^*	Stems, 3.5 ± 1.2	40.2 ± 29.4 (8.9-59.9)	Lower than expected; (P<0.0001)^‡
Diversity (Fisher's alpha)^**	Larrea, 15.7 ± 4.8	11.6 ± 4.0 (8.6-14.8)	No difference from expected; (P>0.05)^‡
	Parkinsonia, 11.4 ± 3.5
	Simmondsia, 7.9 ± 1.9

Isolation frequency differed significantly as a function of tissue type; see text and Table 2.

^**

Diversity differed among host species but not as a function of other explanatory variables; see Table 2.

^‡

Result was consistent when based on data from leaves only, and when based on data from leaves and stems.