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Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (9): 2300-2316.doi: 10.16420/j.issn.0513-353x.2024-0834

• Genetic & Breeding·Germplasm Resources·Molecular Biology • Previous Articles     Next Articles

Drought Resistance Evaluation of Apricot Germplasm Resources Based on Leaf Microstructure

LI Jialong1,2, LUAN Xiyun1,2, TANG Zhanghu3, HAN Aizhi4, GUO Ling1,2,*()   

  1. 1 College of Faculty of Horticulture and ForestryTarim University,Alar, Xinjiang 843300, China
    2 South Xinjiang Facility Agriculture Corps Key LaboratoryAlar, Xinjiang 843300, China
    3 Luntai Fruit Tree Resource Nursery of Xinjiang Academy of Agricultural SciencesLuntai, Xinjiang 841600, China
    4 Instrumental Analysis Center of Tarim UniversityAlar, Xinjiang 843300, China
  • Received:2024-12-08 Revised:2025-07-16 Online:2025-09-25 Published:2025-09-24
  • Contact: GUO Ling

Abstract:

The leaf anatomical structure and stomata morphological characteristics of 96 apricot from Central Asia ecogroup and North China ecogroup were observed by paraffin section and nail polish blotting. Furthermore,leaf typicality indexes that reflecting the drought resistance of apricot germplasm were screened by using correlation analysis and principal component analysis,and the drought resistance of germplasms from different ecological groups were comprehensively evaluated by using the affiliation function. The study showed that:the 96 apricot germplasm leaves are all typical bifacial leaf. In the meantime,the stomata are renal-type stomata,and unevenly distributed in the lower epidermis of the leaves,included among which 3 germplasm leaves of‘Kala Huanna’‘Kuipikeman’and‘Tianrenxing’ also had stomatal existed in the upper epidermis. However,the size of the stomata are small and their number are also relatively few. Leaf thickness,stomatal length,thickness of palisade tissue,stomatal width,stomatal area,upper epidermal cell thickness,upper epidermal cell width are screened out as the effective drought resistance evaluation indexes of 96 germplasm. It is demonstrated that the strongest germplasm for drought-resistant is‘Suogejia’nali’and the weakest is‘Yechengzixing’. And 2 ecological groups had obvious differences in leaf microstructure and drought resistance among apricot germplasm,9 germplasm with very strong drought resistance,such as‘Suogejia’nali’‘Yuandanxing’and‘Huanghongdaike’,are eventually screened and can be utilized as excellent materials for drought- resistant breeding of apricot.

Key words: apricot, ecological groups, anatomical structure, stoma characteristic, the method of affiliation functions, drought resistance evaluation