Study of Nutrient Solution Management in Soilless Rose Cultivation Through the Analysis of Physiological Parameters and Nutrient Absorption

Sánchez, Elisa Gorbe

doi:10.4995/thesis/10251/6921

Cited by 1 publication

(2 citation statements)

References 99 publications

(200 reference statements)

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“…Mesophyll cells near the midrib in some leaflets under Put0 and Put0.2 treatments had lower Fv/Fm, FPSII, and FNPQ, but had higher FNO than mesophyll cells in other parts of the leaf. There is a report suggesting that leaf section next to the midrib has a more severe change of chlorophyll fluorescence parameters (Gorbe, 2009). They also find that the capacity of photoprotection of PSII, indicated by the ratio FNPQ/FNO decreases progressively as flower shoots wilt and vase life ends in cut rose flowers (Gorbe, 2009).…”

Section: Discussionmentioning

confidence: 96%

“…There is a report suggesting that leaf section next to the midrib has a more severe change of chlorophyll fluorescence parameters (Gorbe, 2009). They also find that the capacity of photoprotection of PSII, indicated by the ratio FNPQ/FNO decreases progressively as flower shoots wilt and vase life ends in cut rose flowers (Gorbe, 2009). Our results showed that the leaflets under Put0 and Put0.2 treatments lost the photoprotection ability due to the decreased FNPQ and increased FNO, while those sprayed with 2.0 mM Put still had this capability of dissipating excess energy.…”

Section: Discussionmentioning

confidence: 99%

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Effects of Exogenous Putrescine on Delaying Senescence of Cut Foliage of Nephrolepis cordifolia

Jiang

Wuyun

et al. 2020

Front. Plant Sci.

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Senescence is the main limitation for cut foliage display in vase. Naturally occurring polyamines such as putrescine (Put) have been considered effective anti-senescence agents. However, effect of Put on cut foliage in vase in a realistic indoor environment has not yet been revealed. In the present study, effects of Put spraying on the postharvest performance of cut foliage of Nephrolepis cordifolia L. were investigated. Cut fronds sprayed with deionized water (Put0) showed visible injuries after 10 days in vase. Meanwhile, chlorophyll (Chl), soluble protein (Sp), and proline (Pro) content were decreased by 60.15, 57.93, and 73.09% respectively, photochemical activity reflected by Chl fluorescence parameters was inhibited, whereas electrolyte leakage (EL), contents of soluble sugar (Ss), malondialdehyde (MDA), and hydrogen peroxide (H 2 O 2) were increased (+194.29, +44.83, +34.06, and +178.01%, respectively). Put spraying extended the vase life of the cut foliage and the 2.0 mM Put had a longer vase life (21 days) than 0.2 mM (15 days). Leaf spraying of 2.0 mM Put for 10 days significantly ameliorated the losses of Chl, Sp, and Pro content (−10.72, −26.29, and −42.64%, respectively), followed by 0.2 mM Put (−27.36, −36.24, and −60.55%, respectively). Put spraying also improved photochemical capability and prevented membrane impairment as well as visible injury in comparison with Put0. In addition, 2.0 mM Put had a better mitigating ability than that of 0.2 mM. Leaf spraying of 2.0 mM Put greatly reduced the decline of the effective quantum yield of photochemical energy conversion in PSII (FPSII), the maximal quantum yield of PSII photochemistry measured in the dark-adapted state (Fv/Fm) and electron transport rate (ETR) (−7.89, −12.91, and −10.06%, respectively), and also inhibited the increases of EL, MDA, Ss, and H 2 O 2 (+31.87, +6.43, +16.22, and +49.40%, respectively). Overall, Put played important roles in deterring the degradation of Chl, Ss, and Pro, detoxifying the H 2 O 2 , weakening the sugar signaling, mitigating the decline of photochemical activity, and eventually postponing the leaf senescence. The present study gives new insights into effects of Put on leaf senescence and provides a strategy for preserving post-harvest cut foliage.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%