Studies on the Functional Components and Bioactivity and the Relativity of Bamboo Shoots and Shells

Abstract:

Two species of bamboo, Phyllostachys edulis and Phyllostachys aureosuleata (including 4 cultivars for each of the species) are known to have significant amounts of phenols and flavonoids, and exhibit a strong antioxidant activity. Experiments were conducted to examine the variation in the contents of total phenols and flavonoids, and antioxidant activities in the shoots and shells. The result showed that the hightest contents of total phenols and total flavonoids were P. aureisykeata cv. Spectabilis and P. edulis cv. Heterocycla, respectively. The antioxidant activities were determined by DPPH(scavenging assays of DPPH radicals). Among all of the shoots samples analyzed, the P. aureisykeata cv.Spectabilis showed the best performance in scavenging assays of DPPH radicals. Among the shells, the P. edulis cv. Heterocycla showed the best performance. In addition, significant correlations were found between the contents of total phenols and flavonoids and DPPH radical scavenging activity. This work indicated that ethanol extracts of shoots and shells from eight cultivars bamboo exhibited stronger antioxidant activities compared with those of the commercial compound (Trolox). It might be considered as a potential rich sources of natural antioxidants.

• Periodical: Applied Mechanics and Materials (Volume 108)
• Pages: 314-319
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.108.314
• Online since: October 2011
• Authors: Yong Chun Jin, Ke Yuan
• Keywords: Antioxidant Activity, DPPH, Flavonoid, Phenols, Phyllostachys aureosuleata, Phyllostachys edulis

References

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[10] Wang CH, Zhong, XH, Li LD, Zhang M, Chu, ZH. 2009. Study on the extraction of polyphenols from the persimmon in the leaves. Progress in Modern Biomedicine. 9: 4540-2442. Table 1. The contents of total flavonoids and total phenols in shoots and shells of eight cultivars of bamboo. Variety shoot of bamboo shell of bamboo TF(mgRE/g) TPA(mgGAE/g) TF(mgRE/g) TPA(mgGAE/g) Edulis.

[3] 088±0. 002.

[13] 087±0. 001.

[5] 455±0. 019.

[15] 622±0. 011 Gracilis.

[2] 363±0. 010.

[12] 124±0. 022.

[6] 075±0. 011.

[15] 315±0. 015 Tao Kiang.

[3] 352±0. 005.

[13] 893±0. 001.

[5] 022±0. 013.

[15] 161±0. 031 Heterocycla.

[1] 938±0. 021.

[10] 672±0. 038.

[6] 325±0. 008.

[16] 692±0. 028 Aureosuleata.

[2] 356±0. 023.

[12] 053±0. 001.

[2] 138±0. 001.

[12] 598±0. 001 Aureocarlis.

[3] 163±0. 026.

[13] 444±0. 022.

[1] 346±0. 010.

[9] 264±0. 021 Spectabilis.

[4] 088±0. 033.

[14] 642±0. 010.

[1] 292±0. 002.

[9] 103±0. 004 Pekinensis.

[2] 763±0. 012.

[12] 529±0. 038.

[1] 349±0. 012.

[9] 359±0. 021 *Values are expressed as means ± standard deviation (n=3). Using LSD multiple comparison, significance level a=0. 05, Means with different letters were significantly different at the level P < 0. 05. Table 2 The total reducing capacity and the scavenging capacity in the shoots and shells of eight cultivars (in two species) bamboo. Variety Eubescens Gracilis Tao Kiang Heterocycla Aureosuleata Aureocarlis Spectabilis Pekinensis DPPH shoot of bamboo.

[2] 191±.

061.

[1] 995±.

022.

[2] 189±.

005.

[1] 585±.

006.

[1] 326±.

011.

[2] 215±.

001.

[2] 276±.

004.

[2] 047±.

011 sheel of bamboo.

[18] 973±.

056.

[24] 877±.

491.

[16] 172±.

915.

[24] 223±.

[1] 108.

[15] 577±.

893.

[14] 885±.

110.

[16] 266±.

042.

[13] 512±.

012 Table 3 The relativity analysis between the TF and TP contents and antioxidant capacity of shoots. TF content TPA content DPPH TF content 1.

977.

776* TPA content 1 DPPH 1 Table 4 The relativity analysis between the TF and TP contents and antioxidant capacity of shells. TF content TPA content DPPH TF content 1.

966.

915* TPA content 1.

868* DPPH 1 Figure 1. The standard curve of rutin Figure 2. The standard curve of Gallic acid Figure 3. The scavenging rate of the shoots of bamboo on DPPH • with different concentrations Figure 4. The TEAC values of the shoots of bamboo Figure 5. The scavenging rate of the sheels of bamboo on DPPH • with different concentrations Figure 6. The TEAC values of the shells of bamboo.

DOI: 10.7717/peerj.7651/fig-10