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- W2788481610 abstract "Crown division, tissue culture, and culm cuttings are methods for propagating purple fountain grass [ Pennisetum × advena Wipff and Veldkamp (formerly known as Pennisetum setaceum Forsk. Chiov. ‘Rubrum’)]. However, propagation by culm cuttings is becoming an economically attractive method for quick liner production. Our objective was to quantify the impact of propagation daily light integral (PDLI) and root-zone temperature (RZT) on root and culm development of single-internode purple fountain grass culm cuttings. Before insertion into the rooting substrate, cuttings were treated with a basal rooting hormone solution containing 1000 mg·L −1 indole-3-butyric acid (IBA) + 500 mg·L −1 1-naphthaleneacetic acid (NAA). The cuttings were placed in a glass-glazed greenhouse with an air temperature of 23 °C and benches with RZT set points of 21, 23, 25, or 27 °C. PDLIs of 4 and 10 mol·m −2 ·d −1 (Expt. 1) or 8 and 16 mol·m −2 ·d −1 (Expt. 2) were provided. After 28 d, culm and root densities (number) increased as the RZT increased from 21 to 27 °C, regardless of PDLI during Expt. 1. Compared with 4 mol·m −2 ·d −1 , a PDLI of 10 mol·m −2 ·d −1 generally resulted in the greatest root biomass accumulation. For example, as PDLI increased from 4 to 10 mol·m −2 ·d −1 , root dry mass increased by 105%, 152%, and 183% at RZTs of 21, 25, and 27 °C, respectively. In Expt. 2, as the RZT increased from 21 to 23 °C, root dry mass increased by 70% under a PDLI of 8 mol·m −2 ·d −1 . However, root dry mass was similar among all RZTs under a PDLI of 16 mol·m −2 ·d −1 . Our results indicate that single-internode culm cuttings of purple fountain grass can be most efficiently propagated under PDLIs of 8–10 mol·m −2 ·d −1 together with RZT set points of 23 to 25 °C for quick liner production." @default.
- W2788481610 created "2018-03-06" @default.
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- W2788481610 date "2018-02-01" @default.
- W2788481610 modified "2023-09-26" @default.
- W2788481610 title "Propagation Daily Light Integral and Root-Zone Temperature Influence Rooting of Single-internode Pennisetum ×advena Culm Cuttings" @default.
- W2788481610 doi "https://doi.org/10.21273/hortsci12455-17" @default.
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