| The study aimed to discuss the effect of sowing date on physiological and biochemical characteristics of new
wheat cultivar Bainong 207 in the overwintering period. The experiment was conducted on five sowing dates including Octo⁃
ber 1, October 8, October 15, October 22, October 29 and November 5, the interrelated physiological biochemical index in
cold tolerance during overwintering period during 2016—2017 was determined, such as root activity, chlorophyll content, proline(Pro) content, soluble protein(Pr) content, malondialdehyde(MDA) content, SOD activity and POD activity, taking
Zhoumai 18 as the control variety. The results showed that, under the natural conditions in the field, the changing trends of
the different physiological biochemical index on two wheat cultivars weren't consistent during the overwintering period.
Compared with Zhoumai 18, except the Pro content in November 5 was significantly reduced (P < 0.05), root activity, chlo⁃
rophyll content, Pro content, Pr content, SOD activity and POD activity on Bainong 207 were increased, and MDA content
was reduced significantly (P < 0.05). Therefore, Bainong 207 was more tolerant to low temperature than Zhoumai 18 during
overwintering period, the cold tolerance in October 8 and October 15 were better than other sowing date, which were the ap⁃
propriate sowing date for new wheat variety Bainong 207, Zhoumai 18 should be sowed relatively later. |
