Skip to Main Content
Microbial populations and activities in the rhizoplane of rock-weathering desert plants. II. growth promotion of cactus seedlings.Author(s): M.E. Puente; C.Y. Li; Y. Bashan
Source: Plant Biology. 6: 643-650
Publication Series: Scientific Journal (JRNL)
PDF: Download Publication (820 KB)
DescriptionFour bacterial species isolated from the rhizoplane of cacti growing in bare lava rocks were assessed for growth promotion of giant cardon cactus seedlings (Pachycereus pringlei). These bacteria fixed N2, dissolved P, weathered extrusive igneous rock, marble, and limestone, and significantly mobilized useful minerals, such as P, K, Mg, Mn, Fe, Cu, and Zn in rock minerals. Cardon cactus seeds inoculated with these bacteria were able to sprout and grow normally without added nutrients for at least 12 months in pulverized extrusive igneous rock (ancient lava flows) mixed with perlite. Cacti that were not inoculated grew less vigorously and some died. The amount of useful minerals (P, K, Fe, Mg) for plant growth extracted from the pulverized lava, measured after cultivation of inoculated plants, was significant. This study shows that rhizoplane bacteria isolated from rock-growing cacti promote growth of a cactus species, and can help supply essential minerals for a prolonged period of time.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationPuente, M.E.; Li, C.Y.; Bashan, Y. 2004. Microbial populations and activities in the rhizoplane of rock-weathering desert plants. II. growth promotion of cactus seedlings. Plant Biology. 6: 643-650
KeywordsAzospirillum, Bacillus, cactus, cardon, Citrobacter, desert, N2-fixation, Pachycereus, phosphate solubilization, Pseudomonas, rock degradation, rock weathering, soil formation
- Endophytic bacteria in cacti seeds can improve the development of cactus seedlings.
- Rock-degrading endophytic bacteria in cacti
- Microbial populations and activities in the rhizoplane of rock-weathering desert plants. I. root colonization and weathering of igneous rocks.
XML: View XML