Table 1

Leaf morphological grade standard of Rhododendron under drought stress"

Fig.1

The colonization of P. indica A1 is the uncolonized root after Trypan blue staining; A2 is the colonized root after Trypan blue staining; B1 is the uncolonized root under scanning electron microscope; B2 is the colonized root under scanning electron microscope; C shows the molecular detection results of Pi group; D shows the colonization rate of P. indica; The different lowercase letters indicate a significant difference at 0.05 level. CK：对照control；Pi：印度梨形孢菌液处理P. indica liquid treatment."

Fig.2

Changes of leaf morphological structure after P. indica colonization A1 and A2 refer to the leaves treated with CK for 30 and 60 days, respectively; B1 and B2 refer to the leaves treated with P. indica liquid for 30 and 60 days; C1 and C2 refer to the cross-sectional anatomical structure of leaves treated with CK for 30 and 60 days; D1 and D2 refer to the cross-sectional anatomical structure of leaves treated with P. indica liquid for 30 and 60 days; E–N represents the LFW (leaf fresh weight), LDW (leaf dry weight), LA (leaf area), LI (leaf index), LT (leaf thickness), UET (upper epidermis thickness), LET (lower epidermis thickness), PT (palisade parenchyma thickness), ST (spongy parenchyma thickness), and P/S (palisade to spongy ratio of leaves treated with CK and P. indica liquid for 30 and 60 days, respectively."

Fig.3

Effect of colonization P. indica on root ultrastructure A is the root system of CK group ( left ) and Pi group ( right ) after 60 days of treatment; B is the thickness of the cell wall; C is the cross-sectional area of the cell; D1 and D2 are root cells of the CK group treated for 60 days, with magnifications of 2 500 and 7 000 times, respectively; E1 and E2 are root cells of the Pi group treated for 60 days, with magnifications of 2 500 and 7 000 times, respectively. CW: 细胞壁Cell wall; M: 线粒体Mitochondria; G: 高尔基体Golgi."

Fig.4

Effects of colonizing P. indica on plant drought resistance A: The grading of wilting damage of leaves in CK and Pi groups under different stress time was studied; B: The relative conductivity of CK and Pi group leaves under different stress time; C: The death rate of plants after 10 days of rewatering."

Table 2

Logistic equation of relative conductivity and drought half lethal time（LT50）under drought stress"

Fig.5

Changes of proline, MDA content and SOD activity under drought stress"