| Species/morphological fraction | Effect on lignin | References |
| Drought | Forage legumes | ↓↑ | [48–52] | Forage grasses | ↓↑— | [53–55] | Maize leaves, Zea mays L. | ↓↑— | [56, 57] | Barley straw, Hordeum vulgare L. | ↑ | [58] |
| Salinity | Lettuce roots, Lactuca sativa L. | ↑ | [59] | Tomato roots, Solanum lycopersicon L. | ↑— | [60, 61] | Bean roots, Phaseolus vulgaris L. | ↑ | [62] | Maize roots, Zea mays L. | ↑ | [63] | Rice root, Oryza sativa L. | ↓↑ | [64, 65] | Soybean root, Glycine max L. | ↑ | [66] |
| Mineral toxicities (Al, B, Cd, Cu, Mn) | Chamomile root, Matricaria chamomilla L. | ↓↑— | [67] | Rice roots | ↑ | [68] | Wheat roots, Triticum aestivum L. | ↑ | [69, 70] | Flax roots, Linum usitatissimum L | ↑ | [71] | Soybean roots | ↑ | [72, 73] | Tomato roots | ↑ | [74] |
| Mineral deficiencies (Ca, K, Mn, N, P, Si) | Wheat root and shoot | ↓ | [75, 76] | Chamomile root | ↑ | [77] | Tobacco root/shoot, Nicotiana tabacum L. | ↑ | [78] | Soybean root | ↑ | [79] | Potato tubers, Solanum tuberosum L. | ↑ | [80] | Rice shoot | ↑ | [81] |
| Ozone | Rice straw | ↑ | [32, 34, 82] | Forage legumes | ↑ | [83, 84] | Forage grasses | ↑ | [85–87] |
| UV | Forage grasses | ↑ | [88] | Tomato fruit | ↑ | [89] | Cucumber seedlings, Cucumis sativus L. | ↑ | [90] | Quinoa seedlings; Chenopodium quinoa Willd. | ↑ | [91] | Soybean leaves | ↓ | [92] |
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