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有關一篇論文的翻譯~(可以幫我翻順~謝謝囉)

To explore the possibility of overcoming the highly phytotoxic effect of

SO2 and salt stress, we introduced the maize Cu/ZnSOD and/or CAT

genes into chloroplasts of Chinese cabbage.

SOD+CAT plants showed enhanced tolerance to 400 ppb SO2, and

visible damage was one-sixth that of wild-type (CK) plants.

In addition, when SOD+CAT plants were exposed to a high salt

treatment of 200 mM NaCl for 4 weeks, the photosynthetic activity of

the plants decreased by only 6%, whereas that of CK plants decreased

by 72%.SOD plants had higher total APX and GR activities than CK plants. As expected, SOD plants showed levels of protection from SO2 and

salt stress that were moderately improved compared to CK plants.

However,CAT plants showed inhibition of APX activity and provided only limited improvements in plant stress tolerance. Moreover, SOD+CAT

plants accumulated more Kþ, Ca2+ and Mg2+ and less Na+in their leaves compared with those of CK plants.

These results suggest that the expression of SOD and CAT simultaneously is suitable for the introduction of increased multiple stress protection.

已更新項目:

Kþ是k+ 鉀離子

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這是有關於生物化學的報告~

1 個解答

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  • 1 0 年前
    最佳解答

    本研究旨在探索如何克服二氧化硫與鹽逆境對於植物高毒害作用的可能做法,為此特別將銅/鋅超氧化歧化酶 (Cu/ZnSOD;copper/zinc superoxide dismutase)與/或 過氧化氫酵素 (CAT;catalase) 基因引入白菜的葉綠素粒線體之中。

    SOD+CAT 白菜對於二氧化硫的耐受性可提升至 400 ppb,而可見的損害程度則為野生種(CK)白菜的六分之一。

    此外,SOD+CAT 白菜暴露在 200 mM 高濃度鹽份的環境,經過 4個星期之後,光合作用活動只減低 6%;相對地,CK白菜則減低 72%。再者,SOD 白菜也比 CK 白菜有較高的APX (ascorbate peroxidase;抗壞血酸過氧化物酶)與 GR (glutathione reductase;麩胱甘「月太」還原酶) 活動。

    一如預期,相較於 CK白菜,SOD 白菜對於二氧化硫與鹽害的容受性有所改善,呈現出中等的防護效果。 不過,CAT 白菜則呈現抑制 APX 活動的作用,而且逆境容受性的改善程度也極為有限。再者,相較於CK白菜,SOD+CAT 白菜的葉片聚積更多的Kþ (鉀)、Ca2+ (鈣) 與 Mg2+ (錳)g2+ ,而聚積的 Na+ (鈉) 則比較少。

    以上結果似乎暗示,SOD 與 CAT 同時引進植物當中,頗適合用來提供較好的防護作用,以克服多重逆境。

    參考資料: Soho 翻譯、若干年英語地區居住生活經驗
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