Skip to main content
ARS Home » Plains Area » College Station, Texas » Southern Plains Agricultural Research Center » Crop Germplasm Research » Research » Publications at this Location » Publication #375441

Research Project: Pecan Breeding, Genomics, and Genetic Resource Management

Location: Crop Germplasm Research

Title: A study of the evaluation of the pecan drought resistance of grafted 'Pawnee' trees from different seedling rootstocks

item CAO, FAN - Nanjing Forestry University
item WEI, YUNCHU - Nanjing Forestry University
item Wang, Xinwang
item LI, YONGRONG - Nanjing Forestry University
item PENG, FANGREN - Nanjing Forestry University

Submitted to: HortScience
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 9/19/2019
Publication Date: 12/12/2019
Citation: Cao, F., Wei, Y., Wang, X., Li, Y., Peng, F. 2019. A study of the evaluation of the pecan drought resistance of grafted 'Pawnee' trees from different seedling rootstocks. HortScience. 54(12):2139-2145.

Interpretive Summary: Pecan trees have different responses to soil water deficiency. These responses are reflected by several phenotype characters during the plant growth. It is necessary to investigate the growth dynamics during the stress. This preliminary data presented in this study will provide fundamental guidance for our pecan breeding program.

Technical Abstract: To describe the influence of different pecan seedling rootstocks on drought stress resistance, 12 rootstocks of '87MX1-2.2', '87MX5-1.7', 'Elliott', 'Frutoso', 'Giles', 'Major', 'Moore', 'Peruque', 'Posey', 'Riverside', 'San Felipe', and 'VC1-68 were selected as rootstock treatments for grafting. In addition, the experimental materials for the grafted young 'Pawnee' tree treatments included the pressure-volume technique (PV technique) and cutting shoot transpiration methods to plot the PV and the cutting shoot transpiration curves, and the parameters calculated from the two curves were used to analyze the data produced by the subordinate function and cluster dendrogram methods. The results revealed that the different seedling rootstock treatments influenced the 'Pawnee' grafted trees to varying degrees on aspects of drought resistance, the ability to save water, the modulation of osmosis, and the sensitivity of the stomatal response. The order of drought tolerance for these different pecan seedling rootstock treatments from high to low was as follows: 'Posey', 'Peruque', 'Riverside', '87MX5-1.7', 'VC1-68', 'Elliott', '87MX1-2.2', 'San Felipe', 'Moore', 'Major', 'Giles', and 'Frutoso'.