2003
DOI: 10.1104/pp.103.029579
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Increased Phytochrome B Alleviates Density Effects on Tuber Yield of Field Potato Crops

Abstract: The possibility that reduced photomorphogenic responses could increase field crop yield has been suggested often, but experimental support is still lacking. Here, we report that ectopic expression of the Arabidopsis PHYB (phytochrome B) gene, a photoreceptor involved in detecting red to far-red light ratio associated with plant density, can increase tuber yield in field-grown transgenic potato (Solanum tuberosum) crops. Surprisingly, this effect was larger at very high densities, despite the intense reduction … Show more

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Cited by 123 publications
(74 citation statements)
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References 39 publications
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“…The sorghum ubiquitin gene (SbUBQ) was used as a loading control. Transgenic potato (Solanum tuberosum) plants overexpressing phyB produced more branches at high plant density (Boccalandro et al, 2003). These results are consistent with the hypothesis that active phyB suppresses accumulation of the TB1 mRNA, thereby promoting bud outgrowth.…”
Section: Discussionsupporting
confidence: 80%
“…The sorghum ubiquitin gene (SbUBQ) was used as a loading control. Transgenic potato (Solanum tuberosum) plants overexpressing phyB produced more branches at high plant density (Boccalandro et al, 2003). These results are consistent with the hypothesis that active phyB suppresses accumulation of the TB1 mRNA, thereby promoting bud outgrowth.…”
Section: Discussionsupporting
confidence: 80%
“…This phenomenon is intensified by the presence of weeds that further enrich the crops with FR through FR reflection. Although many modern crops are semidwarf varieties, they still show FR-or high density-induced responses, such as stem elongation in maize (Zea mays; Dubois et al, 2010) and potato (Solanum tuberosum; Boccalandro et al, 2003), reduced tillering in wheat (Triticum aestivum; Ugarte et al, 2010), and reduced tuber growth in potato (Boccalandro et al, 2003). All these responses reduce crop yield.…”
Section: Shade Avoidancementioning
confidence: 99%
“…Likewise, natural populations of Impatiens capensis become more sensitive to drought when expressing shade avoidance responses as compared with less shadeavoiding populations, presumably through reduced root investments in shade-avoiding plants (Huber et al, 2004). Although there have been studies showing yield suppression by low R:FR exposure in crops (Boccalandro et al, 2003;Ugarte et al, 2010), these have not considered light quality-induced suppression of root growth.…”
Section: Flexible Shoots and Roots Under Stress Light Signaling Affecmentioning
confidence: 99%
“…A lot of work has been done on transformation of PHYB in potato (Thiele et al, 1999;Boccalendo et al, 2003;Schittenhelm et al, 2004), tomato (Said et al, 2007), and Arabidopsis (Wagner et al, 1991). The present investigation was carried out in cotton to determine the effect of overexpression of Arabidopsis thaliana PHYB gene on cotton growth and yield.…”
Section: Introductionmentioning
confidence: 99%