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Biomedical subjects

Daozhi Wei

Publications and source records attributed to Daozhi Wei.

3 recordsLinked to original sources
PubMed2004

[Relationship between wheat root activity and leaf senescence].

A field trial on the wheat root activity, chlorophyll content and photosynthetic rate showed that the decline of root activity was earlier and faster than that of flag leaf chlorophyll content and photosynthetic rate, and there was a positive correlation between root activity and leaf photosynthetic rate (r = 0.8006). Topdressing nitrogen fertilizer at elongation stage could obviously improve root activity and photosynthetic rate, decrease leaf ABA content, increase ZRs content and SOD activity, and delay the peak value of MDA for 8-10 days, which suggested that the variation of root activity was closely related to the senescence of flag leaf. Improving root nutrition and root activity at earlier growth stages could delay the senescence of wheatleaf.

Biomass↗
PubMed2004

[Effect of hormones on regulating and controlling photosynthesis rate of wheat nag leaf at their different development phases].

By the method of ELASA, this paper measured the ABA/ZRs ratio in wheat flag leaf at the relative steady phase (RSP), end steady phase (ESP) and sharply descending phase (SFP) of chlorophylls. The ABA, ZRs and their mixture were led to the transpiration current of plant to measure the changes of photosynthesis rate at these three phases. The results showed that the ABA/ZRs ratio in flag leaf was 4.20, 41.83 and 14.40 at RSP, ESP and SFP, respectively. The time that the photosynthesis rate reduced by ABA to zero was 49.5, 39.1 and 38.0 min, and that reduced by ZRs to half was 65, 49 and 31 min, respectively. The two preceding phases could be regulated, and the changes were reversible.

Abscisic Acid↗