Spondiashaplophylla Airy Shaw and Forman] which occurs in China (Yunnan), Vietnam, Myanmar, and NE India (Assam).It has simple or unifoliolate
leaves, contrasting with the pinnately compound leaves of most Spondioideae.
The plants were thinned at unifoliolate
leaf stage to 5cm between plants, maintaining 20 seedlings per meter row length.
Plants of each genotype (two pots each with eight plants) were inoculated at the unifoliolate
leaf stage with SMV strains G1 or G7.
The leaves tend to be decussate on the lower stem (with opposite pairs, the succeeding pairs turned 180[degrees]), usually alternate near the stem apex, petiolate, palmately compound (except for small unifoliolate
leaves at branch apices), with an odd number (3-13) of coarsely serrate, lanceolate leaflets.
The twinspots are of variable size and are apparent on the upper surfaces of the unifoliolate
and early trifoliolate leaves of TW 98-1 during the juvenile growth period.
Lindley, 1831; Meacham, 1980; Cronquist, 1981; Takhtajan, 1997, among many others) to consider these leaves as unifoliolate
Plants were inoculated at the unifoliolate
stage at the same time.
The abaxial leaf surfaces of two unifoliolate
leaves in each plant were inoculated at 7 d after planting with the rust spore suspension using the inoculation technique of Stavely (1983).
At R1 of each cultivar each year, height from the soil surface to the main stem apex was measured and node number (unifoliolate
node = one) was counted to include the node of the uppermost unrolled trifoliolate on five plants in each plot.
Dwelley (PI 598079) is a unifoliolate
Kabuli-type cultivar that was developed for resistance to Ascochyta blight (Muehlbauer et al., 1998b).
Brakke and Gardner (1987) reported that a low rate of early growth in pigeonpea was associated with a lack of exposed cotyledons and small unifoliolate
and trifoliolate leaves.
The stem was girdled below Node 7 (Node 6 in Exp.1) for the one-node treatment (Node 1 was the node of the unifoliolate