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Validating field regeneration capacity for selected accessions of Gossypium hirsutum using callus induction and regeneration capacity

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Journal of Cotton Research 2023年第2期6卷 98-111页

作者： TAJO Sani Muhammad PAN Zhaoe HE Shoupu JIA Yinhua MAHMOOD Tahir NAZIR Mian Fasil HU Daowu WANG Liru SADAU Salisu Bello IBRAHIM Sani AUTA Umar GENG Xiaoli DU Xiongming Zhengzhou Research Base National Key Laboratory of Cotton Bio‑Breeding and Integrated UtilizationZhengzhou UniversityZhengzhou 450001China National Key Laboratory of Cotton Bio‑Breeding and Integrated Utilization Institute of Cotton ResearchChinese Academy of Agriculture SciencesAnyangChina Oil Crops Reaserch Institute Chinese Academy of Agriculture SciencesWuhanChina Bioresources Development Centre National Biotechnology Development AgencyAbujaNigeria

Background Gossypium hirsutum undergoes rapid clonal propagation to regenerate a mature plant through tissue ***,the correlation between cotton leaf regeneration,callus induction,and regeneration ability was still *** this research,cotton leaf regeneration level for 21 accessions in the field(new leaves)was observed after the first harvest,and a comparison between field regeneration level and callus induction with its regeneration capacity(new shoots and roots)for the same 21 accessions was carried *** traits,including plant height,leaf area,fresh leaf weight,dry leaf weight,the number of flowers and bolls,and biochemical(proline content)and physiological(chlorophyll and carotenoid content)traits during the flowering stage of 21 upland cotton accessions,were *** A significant correlation between physiological parameters and callus induction was *** induction and regeneration capacity of roots and shoots for hypocotyl,cotyledons,and shoot tip tissues were used to validate field leaf regeneration level after the first *** 24 showed significant leaf regeneration in the field and callus induction capacity through callus induction and *** We found a substantial relationship between field regeneration capability and callus induction with its regeneration capacity for the hypocotyl,cotyledons,and shoot *** results showed that ZS061,Lumian 378,Jimian 863,and ZS065 have the highest moisture retention capacity,while CCRI 24,Liaoyang Duomaomian,and Beizhe Gongshemian have the lowest moisture retention *** 24 has the highest leaf regeneration capacity in the field,while Beizhe Gongshemian has the lowest leaf regeneration *** our result provides a clue for checking the regeneration capacity through leaf regeneration level in the field.

关键词： Upland cotton Agronomic traits Biochemical traits Tissue culture Callus induction regeneration capacity

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Post Debarking Response of Prunus africana (Hook. F) Kalkman (Rosaceae) Trees at Two Exploitation Sites in North Kivu (Eastern Democratic Republic of Congo)

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Open Journal of Forestry 2023年第2期13卷 161-181页

作者： Kambale Eloge Muhesi Musubao Moïse Kapiri Jean Lagarde Betti Ndongo Din Department of Water and Forests Higher Institute of Agronomic Veterinary and Forestry Studies of Butembo Butembo Democratic Republic of Congo Department of Water and Forests Catholic University of the Graben Butembo Democratic Republic of Congo Faculty of Sciences Department of Biology and Physiology of Plant Organisms University of Douala Douala Cameroon

Prunus africana is a species of great economic, medicinal and ecological importance. Due to its multiple uses, unsustainable exploitation methods and low regeneration capacity in tropical rainforests, this species is threatened with extinction. Present and exploited in the eastern part of DR Congo, knowledge of the dynamics of post-bark regeneration of Prunus africana remains fragmentary and poorly known. In North Kivu province, this species thrives in both afromontane forest and lowland tropical rainforest habitats. In order to contribute to the rational and sustainable exploitation of Prunus africana in this province, this paper was carried out with the objective of contributing to the knowledge of the dynamics of the regeneration of post-harvest bark of Prunus africana in two exploitation sites (low and high altitude). To achieve this objective, the inventory was conducted on 16 plots of 25 hectares each, with 8 plots per site. Dendrometric parameters (diameter at breast height (DBH), total tree height) and tree growth and regeneration parameters, i.e., stem bark thickness of the unharvested and harvested portions of the trees (bark reconstitution) were measured. A total of 716 barked stems of Prunus africana in 2016 in 25 hectares constituted the study sample. Results show that sites do not influence diameter at breast height of P. africana trees (p > 0.05) or total tree height. The bark diameter of harvested trees and the bark diameter of unharvested trees varied significantly by site (p 0.05). In contrast, the annual growth rate of bark differed with altitude;the highest rate was observed in trees growing at high altitude (2.97 ± 0.9 mm/yr) compared to 2.23 ± 0.74 mm/yr at low altitude. In view of these results, this study indicates that a half-rotation of 7 years could allow an effective reconstitution of the bark of Prunus africana at the second passage on the remaining side of the same stem.

关键词： Dendrometric Parameters regeneration capacity Tree Reconstitution Rate Debarking Prunus africana DR Congo

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