《Table 1 Effects of formaldehyde and low-light stress on morphological characteristics of Hedera spp

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《Effects of Formaldehyde and Low-light Stress on Growth and Nutrition of Hedera spp.》

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Different lower case letters indicate significant differences at 0.05 level.

Both formaldehyde and low light had a certain influence on the morphology of the two Hedera species.As can be seen in Table1，treatments with formaldehyde and low light alone and in combination decreased both leaf length and leaf width of the two Hedera species，most significantly in treatment T3-HN，and most slightly in treatment T2-HH.Among them，only Treatment T3-HN showed significant difference from CK-HN in leaf length，and the leaf width of treatments T1-HN，T2-HN and T3-HN was significantly smaller than that of CK-HN.Under the stresses of formaldehyde and low light alone and in combination，the leaf shape index of the two Hedera species increased，and the effect in HN was more significant than in HH.In detail，the leaf shape index of HN under all three stress treatments was significantly higher than that of CK-HN，while the leaf shape index of HH in only treatments T2-HH and T3-HH was significantly higher than that of CK-HH.Under the stresses of formaldehyde and low light alone and in combination，the stem length，stem diameter and root length of the two species also declined.The stem length of treatments T1-HN and T3-HN was significantly smaller than that of CK-HN，and the stem length of Treatment T2-HH was significantly smaller than that of CK-HH.Among all the treatments，the decrease in stem length of Treatment T3-HN was the largest，and that of Treatment T1-HH was the smallest.The stem diameter of the two Hedera species was little affected by stress treatments.Among them，the decrease in stem diameter of Treatment T2-HH was the largest，and that of Treatment T1-HH was the smallest.The root length of only Treatment T3-HN was significantly smaller than that of CK-HN.The decrease in root length of Treatment T3-HN was the largest，and that of Treatment T1-HN was the smallest.