Grafting of Tomato with Interspecific Solanaceous Rootstocks: An Approach to Anatomical and Histological Findings

The goal of this study was to evaluate morphological and histological alterations within the tomato graft union and find appropriate rootstocks for better crop propagation. During the academic year 2019-2020, this research was conducted in the Department of Vegetable Science, Horticultural College and Research Institute, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India. Rootstocks of three wild tomatoes, Solanum torvum, S. sisymbrifolium, and S. capsicoides, as well as scions of two tomato hybrids, TNAU tomato hybrid CO3 and Shivam, were used in this experiment. The cleft grafting approach was used for the grafting. At 7, 14, and 21 days after grafting, anatomical and histological sections of six graft combinations and two tomato scion samples were examined microscopically (DAG). S. torvum rootstock showed complete development of vascular connection at 21 DAG, followed by S. sisymbrifolium rootstock, and S. capsicoides rootstock showed only callus growth at 14 DAG, among the six tomato graft combinations. In the S. torvum rootstock, scion growth outpaced rootstock growth, resulting in a mismatch in scion-rootstock stem thickness and delayed epinasty symptom in later stages of plant development. S. sisymbrifolium rootstock was the most suitable for tomato grafting of the three species investigated, however it had a delayed vascular link between the scion and rootstock.

Author(S) Details

L. Pugalendhi
Horticultural College and Research Institute, Tamil Nadu Agricultural University, Coimbatore, India.

S. Bharathi
Horticultural College and Research Institute, Tamil Nadu Agricultural University, Coimbatore, India.

N. A. Tamil Selvi
Horticultural College and Research Institute, Tamil Nadu Agricultural University, Coimbatore, India.

H. Usha Nandhini Devi
Horticultural College and Research Institute, Tamil Nadu Agricultural University, Coimbatore, India.

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