| Effects of different irrigation mode on leaf structure, hormone content, and the gene PbDREB expression of Huangguan pear |
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| DOI：10.7606/j.issn.1000-7601.2018.03.03 |
| Key Words: Huangguan pear water\|saving irrigation leaf tissue hormone DREB |
| Author Name | Affiliation | | HUANG Hai-na | School of Horticulture, Anhui Agricultural University, Hefei, Anhui 230036, China | | YANG Jin-yu | School of Horticulture, Anhui Agricultural University, Hefei, Anhui 230036, China | | LI Hong-xu | Pomology Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | LIU Xiao-yong | Pomology Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | YE Zhen-feng | School of Horticulture, Anhui Agricultural University, Hefei, Anhui 230036, China | | ZHU Li-wu | School of Horticulture, Anhui Agricultural University, Hefei, Anhui 230036, China | | HENG Wei | School of Horticulture, Anhui Agricultural University, Hefei, Anhui 230036, China |
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| Abstract: |
| The experiment of six irrigation models had been conducted in an orchard of 9 year-old ‘Huangguan’ pear. The profile structure, hormone content and the expression of drought resistant gene DREB of leaves were measured. The results showed that there was a positive correlation existed irrigated times or depth and the leaf thickness, cuticle thickness, stockade tissue thickness and CTR under the same irrigated water amount; There was a significant positive correlation between irrigation amount and the expression of the drought resistant gene DREB, T5 (drip irrigation under plastic mulch, irrigated 9 times and each time water move down to 60 cm depth of soil, annual irrigation water at 6750 m3·hm-2) had the high CTR and the lowest SSR. The CTR reached to 32.90% and the SSR reached to 43.62%. It also had high content of the ABA, relatively lowest content of GA, IAA, ZR, and the content of the ABA reached to 118.87 ng·g-1(fresh weight). And it had high expression of the drought resistant gene DREB, the content of DREB expression reached to 2.75. In conclusion, T5 could improve the CTR, promote ABA synthesis, and increase the expression of the drought resistant gene DREB, thus improve the drought resistance of the leaves. There by it should be the suitable water\|saving irrigation model for the pear orchard at Jingtai County in Gansu Province. |
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